Category: Science

A recent study found doctors were able to detect breast cancer more often when they used artificial intelligence to help read mammogram results. As VOA’s Dora Mekouar reports, AI helped boost the breast cancer detection rate by more than 17%.
…

Measles is making a comeback in the United States. 

Fifty-eight cases of the highly contagious disease were reported Tuesday by health officials in rural West Texas, while eight cases were confirmed in neighboring eastern New Mexico.  

Texas officials say the outbreak there, the largest in almost 30 years, is mainly confined to Gaines County, with 45 infections, but four other counties account for an additional 13 cases.   

The Texas measles cases, according to health officials, have occurred mainly among a “close-knit, undervaccinated” Mennonite community. 

Authorities say at least three of the New Mexico cases are in counties that border Texas’ Gaines County. 

Earlier this month, the U.S. Centers for Disease Control and Prevention reported 14 measles cases across the country.  

Mayo Clinic describes measles as “a childhood infection caused by a virus. Once quite common, measles can now almost always be prevented with a vaccine … measles spreads easily and can be serious, and even fatal, for small children.” 

Measles is a respiratory virus that can survive in the air for two hours. As many as nine out of 10 people who are susceptible will get the virus if exposed, according to the CDC.  

However, in recent years, the necessity and safety of the vaccinations designed to prevent the disease have come under question, with some parents citing a now-discredited study that linked the measles vaccine to autism.  

Another unfortunate development in the fight against measles happened during the COVID-19 pandemic when many children missed their vaccinations. Los Angeles Cedars Sinai said in a statement in February 2024 that 61 million fewer doses of the measles vaccine were distributed nationwide from 2020 to 2022.  

Before the MMR vaccination, which addresses not only measles, but also mumps and rubella, was introduced in the U.S. in 1963, there were 3 million to 4 million measles cases every year.   

Now there are usually fewer than 200 cases per year, but pockets of measles persist in areas that still resist the vaccinations. The shots are first given to toddlers between 12 and 15 months and then again at 4 to 6 years of age.   
…

WEST PALM BEACH, FLORIDA — U.S. President Donald Trump on Tuesday signed an executive order to study how to expand access to in vitro fertilization and make it more affordable. 

The order calls for policy recommendations to “protect IVF access and aggressively reduce out-of-pocket and health plan costs for such treatments,” according to the White House. On the campaign trail, Trump called for universal coverage of IVF treatment after his Supreme Court nominees helped to overturn Roe v. Wade, leading to a wave of restrictions in Republican-led states, including some that have threatened access to IVF by trying to define life as beginning at conception. 

Trump, who was at his Florida residence and club Mar-a-Lago, also signed another executive order and a presidential memorandum. The second executive order outlined the oversight functions of the Office of Management and Budget, while the presidential memorandum called for more transparency from the government, according to White House staff secretary Will Scharf, who Trump called to the podium to detail the orders. 

The order called for “radical transparency requirements” for the government, requiring it to detail the “waste, fraud and abuse” that’s found as the Department of Government Efficiency, overseen by Elon Musk, looks to cut government spending. 

DOGE has often fallen short of the administration’s promises of transparency. Musk has taken questions from journalists only once since becoming Trump’s most powerful adviser, and he’s claimed it’s illegal to name people who are working for him. Sometimes DOGE staff members have demanded access to sensitive government databases with little explanation. 

According to a fact sheet provided by the White House, Trump’s IVF order will focus on prioritizing whether there are any current policies “that exacerbate the cost of IVF treatments.” 

Last year, Trump declared public support for IVF after the Alabama Supreme Court ruled that frozen embryos can be considered children under state law. The decision, which some Republicans and conservatives cheered, touched off immediate backlash. 

Families ‘appreciative,’ says Trump

On the campaign trail, IVF quickly became a talking point for Trump, who said he strongly supports its availability. 

In vitro fertilization offers a possible solution when a woman has trouble getting pregnant. The procedure involves retrieving her eggs and combining them in a lab dish with a man’s sperm to create a fertilized embryo, which is then transferred into the woman’s uterus in an attempt to create a pregnancy. IVF is done in cycles, and more than one may be required. 

“I think the women and families, husbands, are very appreciative of it,” Trump said in brief remarks on the order, before he took questions on a variety of topics. 

Trump, who spent the morning at his golf club in West Palm Beach, Florida, spoke to reporters hours before his first joint TV interview with adviser Elon Musk airs in prime time. 

Trump and Musk gave their first joint interview to Sean Hannity of Fox News Channel. The interview was taped on Friday at the White House and is set to air as Musk leads Trump’s effort to cut federal spending and slash the federal workforce. 

Musk has drawn criticism from Democrats in Congress and others for the methods he and his team at DOGE are using to cut spending, including foreign aid, and eliminate jobs across the bureaucracy. 

The Fox News interview also follows Musk’s appearance with Trump in the Oval Office last week, when both defended Musk’s approach to federal cost-cutting. 

In an excerpt from the interview that Fox News released on Sunday, Musk said he “used to be adored by the left” but “less so these days” because of the work he’s doing at Trump’s direction. 

“They call it Trump derangement syndrome. You don’t realize how real this is until you can’t reason with people,” Musk said, adding that normal conversations with Democrats about the president are difficult because “it’s like they’ve become completely irrational.” 

Event celebrates ‘American Exceptionalism’

Trump’s Mar-a-Lago Club is the setting Tuesday night for an awards program by America’s Future, a conservative group led by Mike Flynn, who briefly served as national security adviser in the Republican president’s first term. The program aims to preserve individual rights and promote American values and traditions, according to its website. The event, called Celebrate American Exceptionalism 2025, will honor one member from the Army, the Navy, the Marines, the Air Force and the Space Force. 

The event includes a poolside reception, musical performances and dinner in Mar-a-Lago’s Grand Ballroom, where other award presentations are expected from a lineup that includes such names as comedian Russell Brand, singer Ted Nugent and former pro boxer Mike Tyson. 

It’s unclear whether Trump will participate in the event. 
…

KAMPALA — Uganda discharged on Tuesday the last eight patients who recovered from Ebola, health authorities reported, and there were no other positive cases in the outbreak declared last month. 

World Health Organization described the recoveries as a milestone that “reflects the power of Uganda’s quick and coordinated response.” 

Most of the Ebola patients were treated at the main referral facility in the Ugandan capital, Kampala. 

The lone Ebola victim was a male nurse who died the day before the outbreak was declared in Kampala on Jan. 30. His relatives are among those later hospitalized with Ebola. 

Tracing contacts is key to stemming the spread of Ebola, which manifests as a viral hemorrhagic fever. Ugandan officials documented at least 265 contacts, and at least 90 of them have completed a period of quarantine during which they were monitored for signs of Ebola, Health Minister Jane Ruth Aceng told reporters in Kampala. 

There are no approved vaccines for the Sudan strain of Ebola in Uganda’s outbreak. But authorities have launched a clinical study to further test the safety and efficacy of a trial vaccine as part of measures to stop the spread of Ebola. 

The last outbreak of Ebola in Uganda, which began in September 2022, killed at least 55 people by the time it was declared over four months later. 

Ebola is spread by contact with the bodily fluids of an infected person or contaminated materials. Symptoms include fever, vomiting, diarrhea, muscle pain and at times internal and external bleeding. 

Scientists suspect that the first person infected in an Ebola outbreak acquires the virus through contact with an infected animal or eating its raw meat. Ebola was discovered in 1976 in two simultaneous outbreaks in South Sudan and Congo, where it occurred in a village near the Ebola River, after which the disease is named.
…

Manila, Philippines — The Philippines has detected foreign attempts to access intelligence data, but its cyber minister said on Tuesday no breaches have been recorded so far.

Attempts to steal data are wide-ranging, said minister for information and communications Ivan Uy. Advanced Persistent Threats or APTs have repeatedly attempted but failed to infiltrate government systems, suggesting the country’s cyber-defenses have held firm.

APTs are a general term for cyber actors or groups, often state-backed, that engage in malicious cyber activities.

“These have been present for quite some time, and threats come from many actors, but a big majority of them are foreign,” Uy told Reuters.

Some of these threats, which Uy referred to as “sleepers,” had been embedded in systems before being exposed by government’s cyber security efforts.

“Why are these things operating in those systems, without even anybody calling it out?,” he said.

So far, the government has not seen any cyberattacks targeting critical infrastructure, he said.

“Hopefully it’s because our cyber defenses and cyber security are strong enough,” he said.

Uy acknowledged the difficulty of attributing cyber intrusions to specific attackers, as they sometimes leave misleading digital traces.

However, the government is working through diplomatic channels and sharing intelligence with the military, including with other countries, to validate threats and strengthen defenses, he said.

Last year, the Philippine said it thwarted attempts by hackers operating in China to break into websites and e-mail systems of the Philippine president and government agencies, including one promoting maritime security.

Uy described the escalating cyber threats as part of a global arms race, where nations and criminal organizations exploit digital vulnerabilities for financial or strategic gain.

“World War III is happening and it is cyber,” Uy said. “These weapons are non-kinetic. They are cyber, digital, virtual, but it’s happening. The attacks and defenses are happening as we speak, without any physical manifestation.”

Beyond cyberattacks, Uy has also flagged a surge in deepfakes and what he referred to as “fake news media outlets” aiming to manipulate public opinion ahead of the Philippines’ mid-term elections in May, and the ministry has deployed tools to combat them.

“Misinformation and disinformation are riskier with respect to democracies like ours, because we rely on elections, and elections are based on personal opinion,” Uy said.
…

SEOUL, SOUTH KOREA — South Korea’s data protection authority on Monday said new downloads of the Chinese AI app DeepSeek had been suspended in the country after DeepSeek acknowledged failing to take into account some of the agency’s rules on protecting personal data.

The service of the app will be resumed once improvements are made in accordance with the country’s privacy law, the Personal Information Protection Commission (PIPC) said in a media briefing.

The measure that came into force on Saturday aims to block new downloads of the app, the agency said, though DeepSeek’s web service remains accessible in the country.

The Chinese startup appointed legal representatives last week in South Korea and had acknowledged partially neglecting considerations of the country’s data protection law, the PIPC said.

Italy’s data protection authority, the Garante, said last month it had ordered DeepSeek to block its chatbot in the country after failing to address the regulator’s concerns over its privacy policy.

DeepSeek did not immediately respond to a request for comment.

When asked about earlier moves by South Korean government departments to block DeepSeek, a Chinese foreign ministry spokesperson told a briefing on February 6 that the Chinese government attached great importance to data privacy and security and protected it in accordance with the law.

The spokesperson also said Beijing would never ask any company or individual to collect or store data in breach of laws.
…

Los Angeles — On a recent Sunday, Tracy Quinn drove down the Pacific Coast Highway to assess damage wrought upon the coastline by the Palisades Fire.

The water line was darkened by ash. Burnt remnants of washing machines and dryers and metal appliances were strewn about the shoreline. Sludge carpeted the water’s edge. Waves during high tide lapped onto charred homes, pulling debris and potentially toxic ash into the ocean as they receded.

“It was just heartbreaking,” said Quinn, president and CEO of the environmental group Heal the Bay, whose team has reported ash and debris some 25 miles (40 kilometers) south of the Palisades burn area west of Los Angeles.

As crews work to remove potentially hundreds of thousands of tons of hazardous materials from the Los Angeles wildfires, researchers and officials are trying to understand how the fires on land have impacted the sea. The Palisades and Eaton fires scorched thousands of homes, businesses, cars and electronics, turning everyday items into hazardous ash made of pesticides, asbestos, plastics, lead, heavy metals and more.

Since much of it could end up in the Pacific Ocean, there are concerns and many unknowns about how the fires could affect life under the sea.

“We haven’t seen a concentration of homes and buildings burned so close to the water,” Quinn said.

Fire debris and potentially toxic ash could make the water unsafe for surfers and swimmers, especially after rainfall that can transport chemicals, trash and other hazards into the sea. Longer term, scientists worry if and how charred urban contaminants will affect the food supply.

The atmospheric river and mudslides that pummeled the Los Angeles region last week exacerbated some of those fears.

When the fires broke out in January, one of Mara Dias’ first concerns was ocean water contamination. Strong winds were carrying smoke and ash far beyond the blazes before settling at sea, said the water quality manager for the Surfrider Foundation, an environmental nonprofit.

Scientists on board a research vessel during the fires detected ash and waste on the water as far as 100 miles (161 kilometers) offshore, said marine ecologist Julie Dinasquet with the University of California, San Diego’s Scripps Institution of Oceanography. Things like twigs and shard. They described the smell as electronics burning, she recalled, “not like a nice campfire.”

Runoff from rain also is a huge and immediate concern. Rainfall picks up contaminants and trash while flushing toward the sea through a network of drains and rivers. That runoff could contain “a lot of nutrients, nitrogen and phosphate that end up in the ash of the burn material that can get into the water,” said Dias, as well as “heavy metals, something called PAHs, which are given off when you burn different types of fuel.”

Mudslides and debris flows in the Palisades Fire burn zone also can dump more hazardous waste into the ocean. After fires, the soil in burn scars is less able to absorb rainfall and can develop a layer that repels water from the remains of seared organic material. When there is less organic material to hold the soil in place, the risks of mudslides and debris flows increase.

Los Angeles County officials, with help from other agencies, have set thousands of feet of concrete barriers, sandbags, silt socks and more to prevent debris from reaching beaches. The LA County Board of Supervisors also recently passed a motion seeking state and federal help to expand beach clean ups, prepare for storm runoff and test ocean water for potential toxins and chemicals, among other things.

Beyond the usual samples, state water officials and others are testing for total and dissolved metals such as arsenic, lead and aluminum and volatile organic compounds.

They also are sampling for microplastics, polycyclic aromatic hydrocarbons, or PAHs, that are harmful to human and aquatic life, and polychlorinated biphenyls, or PCBs, a group of man-made chemicals shown to cause cancer in animals and other serious health effects. Now banned from being manufactured, they were used in products like pigments, paints and electrical equipment.

County public health officials said chemical tests of water samples last month did not raise health concerns, so they downgraded one beach closure to an ocean water advisory. Beachgoers were still advised to stay out of the water.

Dinasquet and colleagues are working to understand how far potentially toxic ash and debris dispersed across the ocean, how deep and how fast they sunk and, over time, where it ends up.

Forest fires can deposit important nutrients like iron and nitrogen into the ocean ecosystem, boosting the growth of phytoplankton, which can create a positive, cascading effect across the ecosystem. But the potentially toxic ash from urban coastal fires could have dire consequences, Dinasquet said.

“Reports are already showing that there was a lot of lead and asbestos in the ash,” she added. “This is really bad for people so it’s probably also very bad for the marine organisms.”
…

YAOUNDE, CAMEROON — Chad health officials have sealed several dozen schools, sent thousands of children and their teachers home, and restricted movements to and from the Bologo district — 400 kilometers south of the capital, N’djamena — to contain a measles epidemic. Officials blame vaccine hesitancy for the rapid measles spread within the past two weeks.

State TV reports that thousands of children in Chad’s Bologo district have been ordered to stay home for a week as their schools remain closed to prevent measles from spreading. Many churches and mosques in the district are closed too.

About 50 cases of measles were confirmed within the past two weeks, said Oumar Mahamat Traore, chief health official in Bologo, appointed by Chad’s central government in N’djamena.

He said the situation is very concerning because all seven of the hospitals in Bologo district have at least five children receiving treatment for measles. He said parents should make sure all children having high fever, runny nose, red and watery eyes and rashes on their faces and bodies accompanied by small white spots inside the mouth are immediately rushed to the nearest hospital, where they will receive free treatment.

Traore spoke to VOA on Saturday by telephone. He said it is difficult to know the number of children affected by the measles epidemic because more than 80% of civilians in Bologo prefer African traditional medicine and go to conventional hospitals only in critical circumstances.

Hospitals have not reported any deaths, but some affected children are in critical condition, according to government officials.

Chad’s government said health workers have been dispatched to Bologo and surrounding towns and villages to educate civilians against popular beliefs that the viral disease is divine punishment for wrongdoing and can be treated only by offering traditional sacrifices to the gods.

Health workers are raising awareness that measles can be treated with conventional medicine.

The United Nations reports that measles is one of the main causes of death among children in Chad. Outbreaks occur often because vaccination coverage remains low throughout the central African state.

Chad’s Health Ministry says vaccine hesitancy is to blame for millions of children not being inoculated against childhood diseases including measles.

In 2023, Doctors Without Borders reported that more than 1.3 million children between the ages of 6 months and 10 years old were inoculated against measles.

Chad said there were plans with its international partners to inoculate at least 4 million children in the country of close to 18 million people.

But armed conflicts and tensions triggered by elections to end a three-year transition that followed the death of President Idriss Deby Itno in 2021 made it impossible for humanitarian agencies to continue vaccination drives.

Officials hope that with peace returning and constitutional order reestablished — with the election of Mahamat Idriss Deby as president and the new parliament — more vaccine campaigns will be organized.

Measles is a highly contagious infection of the respiratory system that can lead to severe complications and death. The U.N. says it is one of the most contagious diseases in the world.

In the absence of specific treatment, vaccination is the most effective medical tool against measles, the World Health Organization said. The vaccine is safe, effective and inexpensive, according to the U.N.  
…

TAIPEI, TAIWAN — There is no need for one country to control the semiconductor industry, which is complex and needs a division of labor, Taiwan’s top technology official said on Saturday after U.S. President Donald Trump criticized the island’s chip dominance.

Trump repeated claims on Thursday that Taiwan had taken the industry and he wanted it back in the United States, saying he aimed to restore U.S. chip manufacturing.

Wu Cheng-wen, head of Taiwan’s National Science and Technology Council, did not name Trump in a Facebook post but referred to Taiwan President Lai Ching-te’s comments on Friday that the island would be a reliable partner in the democratic supply chain of the global semiconductor industry.

Wu wrote that Taiwan has in recent years often been asked how its semiconductor industry had become an internationally acclaimed benchmark.

“How did we achieve this? Obviously, we did not gain this for no reason from other countries,” he said, recounting how the government developed the sector from the 1970s, including helping found TSMC, now the world’s largest contract chipmaker, in 1987.

“This shows that Taiwan has invested half a century of hard work to achieve today’s success, and it certainly wasn’t something taken easily from other countries.”

Each country has its own specialty for chips, from Japan making chemicals and equipment to the United States, which is “second to none” on the design and application of innovative systems, Wu said.

“The semiconductor industry is highly complex and requires precise specialization and division of labor. Given that each country has its own unique industrial strengths, there is no need for a single nation to fully control or monopolize all technologies globally.”

Taiwan is willing to be used as a base to assist “friendly democratic countries” in playing their appropriate roles in the semiconductor supply chain, Wu said.
…

U.S. health officials have banned Red Dye No. 3 from American foods, decades after the synthetic coloring was banned in Europe. As VOA’s Dora Mekouar reports, studies have linked the bright red color additive to cancer in male laboratory rats.
…

TAIPEI — Taiwan President Lai Ching-te pledged on Friday to talk with the United States about President Donald Trump’s concerns over the chip industry and to increase U.S. investment and buy more from the country, while also spending more on defense.

Trump spoke critically about Taiwan on Thursday, saying he aimed to restore U.S. manufacturing of semiconductor chips and repeating claims about Taiwan having taken away the industry he wanted back in the United States.

Speaking to reporters after holding a meeting of the National Security Council at the presidential office, Lai said that the global semiconductor supply chain is an ecosystem in which the division of work among various countries is important.

“We of course are aware of President Trump’s concerns,” Lai said.

“Taiwan’s government will communicate and discuss with the semiconductor industry and come up with good strategies. Then we will come up with good proposals and engage in further discussions with the United States,” he added.

Democratic countries including the United States should come together to build a global alliance for AI chips and a “democratic supply chain” for advanced chips, Lai said.

“While admittedly we have the advantage in semiconductors, we also see it as Taiwan’s responsibility to contribute to the prosperity of the international community.”

Taiwan is home to the world’s largest contract chipmaker, TSMC, a major supplier to companies including Apple and Nvidia, and a crucial part of the developing AI industry.

TSMC is investing $65 billion in new factories in the U.S. state of Arizona, a project begun in 2020 under Trump’s first administration.

TSMC’s Taipei-listed shares closed down 2.8% on Friday, underperforming the broader market, which ended off 1.1%.

A senior Taiwan security official, speaking to reporters on condition of anonymity in order to speak more freely, said if TSMC judged it was feasible to increase its U.S. investment, Taiwan’s government would help in talks with the United States.

TSMC did not immediately respond to a request for comment.

The official added that communications between Taiwan and U.S. economic, security and defense officials at present was “quite good” and “strong support from the United States can be felt”.

US support

The United States, like most countries, has no formal diplomatic ties with Chinese-claimed Taiwan, but is the democratically governed island’s most important international backer and arms supplier.

Trump cheered Taiwan last week after a joint U.S.-Japan statement following Japanese Prime Minister Shigeru Ishiba’s visit to Washington called for “maintaining peace and stability across the Taiwan Strait” and voiced support for “Taiwan’s meaningful participation in international organizations.”

But Taiwan also runs a large trade surplus with the United States, which surged 83% last year, with the island’s exports to the U.S. hitting a record $111.4 billion, driven by demand for high-tech products such as semiconductors.

Lai said that the United States is Taiwan’s largest foreign investment destination, and that Taiwan is the United States’ most reliable trade partner.

Trump has also previously criticized Taiwan, which faces a growing military threat from China, for not spending enough on defense, a criticism he has made of many U.S. allies.

“Taiwan must demonstrate our determination to defend ourselves,” Lai said, adding his government is working to propose a special budget this year to boost defense spending from 2.5% of its GDP to 3%.

His government is involved in a standoff with parliament, where opposition parties hold a majority, over cuts to the budget, including defense spending.

“Certainly, more and more friends and allies have expressed concern to us, worried whether Taiwan’s determination for its self-defense has weakened,” Lai said.

 
…

Technology company Google recently broke with its long-standing policy against developing AI weapons. VOA’s Matt Dibble has more from Silicon Valley.
…

BALTIMORE — A federal judge on Thursday temporarily blocked President Donald Trump’s recent executive order aimed at restricting gender-affirming health care for transgender people under age 19.

The judge’s ruling came after a lawsuit was filed earlier this month on behalf of families with transgender or nonbinary children who allege their health care has been compromised by the president’s order. A national group for family of LGBTQ+ people and a doctors organization are also plaintiffs in the court challenge, one of many lawsuits opposing one of the many executive orders Trump has issued.

Judge Brendan Hurson, who was nominated by former President Joe Biden, granted the plaintiffs’ request for a temporary restraining order following a hearing in federal court in Baltimore. The ruling, in effect for 14 days, essentially puts Trump’s directive on hold while the case proceeds. The restraining order could also be extended.

Shortly after taking office, Trump signed an executive order directing federally run insurance programs to exclude coverage for gender-affirming care. That includes Medicaid, which covers such services in some states, and TRICARE for military families. Trump’s order also called on the Department of Justice to vigorously pursue litigation and legislation to oppose the practice.

The lawsuit includes several accounts from families of appointments being canceled as medical institutions react to the new directive.

Attorneys for the plaintiffs argue Trump’s executive order is “unlawful and unconstitutional” because it seeks to withhold federal funds previously authorized by Congress and because it violates anti-discrimination laws while infringing on the rights of parents.

Like legal challenges to state bans on gender-affirming care, the lawsuit also alleges the policy is discriminatory because it allows federal funds to cover the same treatments when they’re not used for gender transition.

Some hospitals immediately paused gender-affirming care, including prescriptions for puberty blockers and hormone therapy, while they assess how the order affects them.

Trump’s approach on the issue represents an abrupt change from the Biden administration, which sought to explicitly extend civil rights protections to transgender people. Trump has used strong language in opposing gender-affirming care, asserting falsely that “medical professionals are maiming and sterilizing a growing number of impressionable children under the radical and false claim that adults can change a child’s sex.”

Major medical groups such as the American Medical Association and the American Academy of Pediatrics support access to gender-affirming care.

Young people who persistently identify as a gender that differs from their sex assigned at birth are first evaluated by a team of professionals. Some may try a social transition, involving changing a hairstyle or pronouns. Some may later also receive puberty blockers or hormones. Surgery is extremely rare for minors.
…

NEW YORK — A new study shows that bird flu has silently spread from animals to some veterinarians.

The study published Thursday by the Centers for Disease Control and Prevention echoes two smaller ones that detected evidence of infection in previously undiagnosed farmworkers. In those studies, several of the infected workers remembered having symptoms of H5N1 bird flu, while none of the veterinarians in the new paper recalled any such symptoms.

The new study is more evidence that the official U.S. tally of confirmed human bird flu infections — 68 in the last year — is likely a significant undercount, said Dr. Gregory Gray, an infectious-disease researcher at the University of Texas Medical Branch in Galveston.

“This means that people are being infected, likely due to their occupational exposures, and not developing signs of illness and therefore not seeking medical care,” Gray said.

He said it shows that officials cannot fully understand bird flu transmission by only tracking people who go to medical clinics with symptoms.

Evidence of antibodies

CDC researchers went to an American Association of Bovine Practitioners veterinary conference in September 2024 in Columbus, Ohio. They recruited 150 vets from 46 states to fill out a questionnaire and agree to have their blood drawn. None said they had suffered red eyes or other symptoms associated with bird flu.

Testing found three of the vets, or 2%, had evidence of antibodies to H5N1 infection. All three worked with dairy cattle, as well as other animals. None had worked with a herd known to be infected, although one had worked with a flock of infected poultry.

Gray and some colleagues did a study last year of 14 dairy farmworkers and found that two, or 14%, had evidence of past infections. Both had experienced symptoms but were never diagnosed.

Another study published last year by the CDC checked 115 dairy workers. The researchers found that eight of them, or 7%, had evidence in their blood of recent infection. Half recalled feeling ill.

The studies were far too small to use as a basis to provide a solid estimate of how many undiagnosed human infections are out there, Gray said. But even just a very small percentage could translate to hundreds or thousands of Americans who were infected while working with animals, he noted.

That’s not necessarily a reason to be alarmed, said Jacqueline Nolting, an Ohio State University researcher who helped CDC with the latest study.

Available studies suggest people who are infected mount antibody responses and may develop natural immunity, which is “good news,” she said.

However, if the virus changes or mutates to start making people very sick, or to start spreading easily from person to person, that would be “a completely different story,” Nolting said.

Caution around sick birds 

The H5N1 bird flu has been spreading widely among wild birds, poultry, cows and other animals. Its escalating presence in the environment increases the chances people will be exposed and potentially catch it, officials have said.

Right now, the risk to the public is low, the CDC says. But officials continue to urge people who have contact with sick or dead birds to take precautions, including wearing respiratory and eye protection and gloves when handling poultry.

“No one’s really questioning that the virus has been moving around the country more than has been reported,” said Keith Poulsen, director of the Wisconsin Veterinary Diagnostic Laboratory. 

He said he expected to see stepped-up information reminding veterinarians across the country to protect themselves with gloves, masks and other equipment to halt infection.
…

At this week’s Artificial Intelligence Action Summit in Paris, world leaders and technologists gathered to discuss the rapidly evolving field of generative artificial intelligence. Many are eager to join the global AI race, while others are proceeding with caution. Tina Trinh reports.
…

WASHINGTON — The U.S. Senate on Thursday confirmed Robert F. Kennedy Jr. as President Donald Trump’s health secretary, putting the prominent vaccine skeptic in control of $1.7 trillion in federal spending, vaccine recommendations and food safety as well as health insurance programs for roughly half the country.

Republicans fell in line behind Trump despite hesitancy over Kennedy’s views on vaccines, voting 52-48 to elevate the scion of one of America’s most storied political — and Democratic — families to secretary of the Health and Human Services Department.

Republican Senator Mitch McConnell, who had polio as a child, was the only “no” vote among Republicans, mirroring his stands against Trump’s picks for the Pentagon chief and director of national intelligence. All Democrats opposed Kennedy.

The GOP has largely embraced Kennedy’s vision to “Make America Healthy Again” by directing the public health agencies to focus on chronic diseases such as obesity.

Kennedy, 71, whose name and family tragedies have put him in the national spotlight since he was a child, has earned a formidable following with his populist and sometimes extreme views on food, chemicals and vaccines.

His audience only grew during the COVID-19 pandemic, when Kennedy devoted much of his time to a nonprofit that sued vaccine makers and harnessed social media campaigns to erode trust in vaccines as well as the government agencies that promote them.

With Trump’s backing, Kennedy insisted he was “uniquely positioned” to revive trust in those public health agencies, which include the Food and Drug Administration, the Centers for Disease Control and Prevention, and the National Institutes for Health.

Last week, Senator Thom Tillis, a Republican, said he hoped Kennedy “goes wild” in reining in health care costs and improving Americans’ health. But before agreeing to support Kennedy, potential holdout Senator Bill Cassidy, a Republican a doctor who leads the Senate Health, Education, Labor and Pensions Committee, required assurances that Kennedy would not make changes to existing vaccine recommendations.

During Senate hearings, Democrats tried to prod Kennedy to deny a long-discredited theory that vaccines cause autism. Some lawmakers also raised alarms about Kennedy financially benefiting from changing vaccine guidelines or weakening federal lawsuit protections against vaccine makers.

Kennedy made more than $850,000 last year from an arrangement referring clients to a law firm that has sued the makers of Gardasil, a human papillomavirus vaccine that protects against cervical cancer. If confirmed as health secretary, he promised to reroute fees collected from the arrangement to his son.

Kennedy will take over the agency amid a massive federal government shakeup, led by billionaire Elon Musk, that has shut off — even if temporarily — billions of taxpayer dollars in public health funding and left thousands of federal workers unsure about their jobs.

On Friday, the NIH announced it would cap billions of dollars for medical research given to universities and hospitals to develop treatments for diseases such as cancer and Alzheimer’s.

Kennedy, too, has called for a staffing overhaul at the NIH, FDA and CDC. Last year, he promised to fire 600 employees at the NIH, the nation’s largest funder of biomedical research.
…

LONDON — Work to give 21st-century London yet another skyscraper has uncovered traces — in fact chunks — of the city’s origins almost 2,000 years ago. 

Archaeologists exploring the site of a planned 32-story office tower announced Thursday that they have unearthed the remains of a Roman basilica that once stood at the heart of the city known as Londinium. 

Excavations in the basement of a building slated to be demolished for the tower at 85 Gracechurch St. uncovered flint, brick and ragstone walls and foundations, up to 1 meter (over 3 feet) wide, 4 meters (13 feet) deep and two millennia old. 

Sophie Jackson of Museum of London Archaeology called it “one of the most significant discoveries” in years in London’s oldest quarter, the City – the square-mile financial district where modern glass high-rises stand atop the remnants of Victorian, medieval and even earlier structures. 

What’s been uncovered are the foundations of a two-story building, almost as big as an Olympic swimming pool. It was constructed between 78 and 84 A.D., about three decades after Roman troops invaded Britain and some 20 years after forces of the Celtic warrior queen Boudicca sacked the fledgling settlement. 

The basilica was part of the forum — the social, political and commercial heart of Roman London — where people went to shop, mingle, seek justice and hear the latest edicts from political leaders. The newly discovered remains are believed to form part of the tribunal, a raised area of the forum where politicians and officials made decisions about the city’s governance. 

It’s the “beating heart of the city,” said Andrew Henderson-Schwartz, head of public impact at Museum of London Archaeology. “It kind of towers above the city. And so it’s a real symbol of Roman power and authority. 

“We’re talking about the early stages of London here, but it’s a real sign of investment in the city, even in its early infancy,” he said. 

Developer Hertshten Properties, which owns the site and has planning permission for a new office tower, has agreed to incorporate the remains into its plans and put them on display in a visitor center. 

Henderson-Schwartz said the extent of the “absolutely massive” foundations discovered in several test pits suggests an “extraordinary” level of preservation. 

Further digging could answer intriguing questions, including why the original forum was only used for 20 years before being replaced by a much larger one, which remained in use until the collapse of Roman rule in Britain three centuries later. Items such as writing tablets, styluses, and even ancient trash could give glimpses into the daily lives of Roman Londoners. 

Property developers in Britain routinely have to consult archaeologists as part of their planning process, a practice that has uncovered finds from Saxon jewelry to medieval ice skates to the skeletons of 14th-century plague victims. 

The latest discovery adds to the scant traces of Roman London that can be seen around the city, including a section of ancient wall, a portion of amphitheater beneath the Guildhall and a temple to the god Mithras which lies incongruously under the modern headquarters of information company Bloomberg. 

“We do have these little windows into Roman London that are all over the city,” Henderson-Schwartz said. “But this is really in some ways the site that connects them all together. This is the heart of Rome in London, where all the decisions were made.” 
…

Seoul — As a high school junior in the Maryland suburbs of Washington, Daneel Kutsenko never gave much thought to China.

Last month, though, as the U.S. government prepared to ban TikTok – citing national security concerns about its Chinese ownership – Kutsenko downloaded RedNote, another Chinese video-sharing app, which he felt gave him a new perspective on China.

“It just seems like people who live their life and have fun,” Kutsenko told VOA of RedNote, which reportedly attracted hundreds of thousands of U.S. users in the leadup to the now-paused TikTok ban.

Kutsenko’s move is part of a larger trend. Even as U.S. policymakers grow louder in their warnings about Chinese-owned apps, they have become a central part of American life.

TikTok, owned by China’s ByteDance, boasts 170 million U.S. users. China’s AI chatbot DeepSeek surged to the top of Apple’s App Store rankings, including those in the United States, for several days after its release last month.

Another major shift has come in online shopping, where Americans are flocking to digital Chinese marketplaces such as Temu and Shein in search of ultra-low prices on clothes, home goods, and other items.

According to a 2024 survey by Omnisend, an e-commerce marketing company, 70% of Americans shopped on Chinese platforms during the past year, with 20% doing so at least once a week.

Multifaceted threat

U.S. officials warn that Chinese apps pose a broad range of threats – whether to national security, privacy, human rights, or the economy.

TikTok has been the biggest target. Members of Congress attempting to ban the app cited concerns that China’s government could use TikTok as an intelligence-gathering tool or manipulate its algorithms to push narratives favorable to Beijing.

Meanwhile, Chinese commerce apps face scrutiny for their rock-bottom prices, which raise concerns about ethical sourcing and potential links to forced labor, Sari Arho Havrén, an associate fellow at the Royal United Services Institute, a London-based research organization, said in an email conversation with VOA.

“It raises questions of how sustainably these products are made,” Havrén, who focuses on China’s foreign policy and great power competition, said. Moreover, he said, “the pricing simply kills local manufacturers and businesses.”

Many U.S. policymakers also warn Chinese apps pose greater privacy risks, since Chinese law requires companies to share data with the government on request.

‘Curiosity and defiance’

Still, a growing number of Americans appear unfazed. Many young people in particular seem to shrug off the privacy concerns, arguing that their personal data is already widely exposed.

“They could get all the data they want. And anyway, I’m 16 – what are they going to find? Oh my gosh, he goes to school? There’s not much,” Kutsenko said.

Ivy Yang, an expert on U.S.-China digital interaction, told VOA many young Americans also find it unlikely that they would ever be caught up in a Chinese national security investigation.

“What they’re chasing is a dopamine peak. They’re not thinking about whether or not the dance videos or the cat tax pictures they swipe on RedNote are going to be a national security threat,” Yang, who founded the New York-based consulting company Wavelet Strategy, said.

Yang said the TikTok ban backlash and surge in RedNote downloads may reflect a shift in how young Americans see China – not just as a geopolitical rival, but as a source of apps they use in daily life.

She also attributes their skepticism to a broader cultural mindset – one shaped by a mix of curiosity, defiance, and a growing distrust of institutions, including conventional media.

Jeremy Goldkorn, a longtime analyst of U.S.-China digital trends and an editorial fellow at the online magazine ChinaFile, said growing disillusionment with America’s political turmoil and economic uncertainty has intensified these shifts.

“It makes it much more difficult for, particularly, young people to get worked up about what China’s doing when they feel so horrified about their own country,” Goldkorn said during a recent episode of the Sinica podcast, which focuses on current affairs in China.

Polling reflects this divide. A 2024 Pew survey found 81% of Americans view China unfavorably, but younger adults are less critical – only 27% of those under 30 have strongly negative views, compared to 61% of those 65 and older.

Digital barrier

While Chinese apps are expanding in the United States, in many ways the digital divide remains as impenetrable as ever.

China blocks nearly all major Western platforms and tightly controls its own apps, while the U.S. weighs new restrictions on Chinese tech.

Though President Donald Trump paused the TikTok ban, his administration has signaled broader efforts to curb China’s tech influence.

Trump officials have hinted they could take steps to regulate DeepSeek, the Chinese digital chatbot.

The Trump administration also recently signaled it intends to close a trade loophole that lets Chinese retailers bypass import duties and customs checks.

Broader challenges

Even as Washington debates how to handle the rise of Chinese apps, some analysts say the conversation risks obscuring the deeper issue of the broader role of social media itself.

Rogier Creemers, a specialist in digital governance at Leiden University, told VOA that while Chinese apps may raise valid concerns for Western countries, they are just one part of a larger, unaddressed problem.

“There’s a whole range of social ills that emerge from these social media that I think are far more important than anything the Chinese Communist Party could do,” he said, pointing to issues like digital addiction, declining attention spans, and the way social media amplifies misinformation and political unseriousness.

“And that would apply whether these apps are Chinese-owned or American-owned or Tajikistani-owned, as far as I’m concerned,” he added.

The United States, Creemer said, has taken a more hands-off approach to regulating online platforms, in part due to strong free speech protections and pushback by the tech industry.

Apps or influence?

For millions of Americans, the bigger debates about China and digital influence barely register when they open TikTok.

Kutsenko said neither he nor his friends have strong opinions about U.S.-China tensions. They just wanted an alternative to TikTok – one that felt fun, familiar, and easy to use.

It’s a sign that while policymakers see Chinese apps as part of a growing tech rivalry, for many Americans they’re just another way to scroll, shop, and stay entertained, no matter where they come from.
…