Day: November 7, 2024

Federal health officials on Thursday called for more testing of employees on farms with bird flu after a new study showed that some dairy workers had signs of infection, even when they didn’t report feeling sick. 

Farmworkers in close contact with infected animals should be tested and offered treatment even if they show no symptoms, said Dr. Nirav Shah, principal director of the U.S. Centers for Disease Control and Prevention. 

The new guidance comes after blood tests for 115 farmworkers in Michigan and Colorado showed that eight workers — or 7% — had antibodies that indicated previous infection with the virus known as Type A H5N1 influenza. 

“The purpose of these actions is to keep workers safe, to limit the transmission of H5 to humans and to reduce the possibility of the virus changing,” Shah told reporters. 

The CDC study provides the largest window to date into how the bird virus first detected in March in dairy cows may be spreading to people. It suggests that the virus has infected more humans than the 46 farmworkers identified in the U.S. as of Thursday. Nearly all were in contact with infected dairy cows or infected poultry. 

Outside experts said it’s notable that the study prompted the CDC to take new action. Previous recommendations called for testing and treating workers only when they had symptoms. 

“This is a significant move towards the assessment that these H5N1 viruses are a greater risk than the CDC estimated before,” said Dr. Gregory Gray, an infectious disease researcher at the University of Texas Medical Branch in Galveston. 

Every additional infection in animals or humans gives the virus the chance to change in potentially dangerous ways, said Angela Rasmussen, a virus expert at the University of Saskatchewan in Canada. 

“It shows yet again that we are not responding effectively to the H5N1 cattle outbreak in humans or animals and if we continue to let this virus spread and jump from species to species, our luck will eventually run out,” Rasmussen said in an email. 

The CDC study included 45 workers in Michigan and 70 in Colorado tested between June and August. Of the eight workers with positive blood tests, four reported no symptoms. All eight cleaned milking parlors and none used respiratory protection such as face masks. Three said they used eye protection. 

High levels of the virus have been found in the milk of infected cows, increasing the risk of exposure and infection, researchers said. 

Researchers said that efforts to monitor dairy workers for illness have been hindered by several barriers including the reluctance of farm owners and farmworkers to allow testing. 

The virus has been confirmed in at least 446 cattle herds in 15 states. Last week, the Agriculture Department said a pig at an Oregon farm was confirmed to have bird flu, the first time the virus was detected in U.S. swine. 
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KINSHASA, DEMOCRATIC REPUBLIC OF CONGO — The spread of mpox has slowed down slightly across Africa, but the epidemic is not over, the African Union’s health watchdog said Thursday.

Fifteen countries across Africa recorded 11,453 mpox cases in the last four weeks, compared with 12,802 in the four weeks prior, the Africa Centers for Disease Control and Prevention said during an online briefing.

But the head of the Africa CDC, Jean Kaseya, warned the epidemic was not over.

“We are still in the acute phase of the outbreak that is pushing us to double our effort to control mpox in Africa,” Kaseya said.

“Unfortunately, we are still losing a number of people,” he said.

Since the start of the year, authorities have recorded 50,840 mpox cases and 1,083 deaths across Africa.

Central Africa accounts for more than 85% of cases and almost all deaths.

The Democratic Republic of Congo, which has recorded more than 39,000 cases and more than 1,000 deaths since the start of the year, launched a vaccination campaign last month that is still “limited,” according to the Africa CDC.

Some 51,649 people have been vaccinated in six provinces, the Africa CDC said.

“We hope that with these vaccines we can continue to support countries to stop this outbreak,” Kaseya said.

Health agencies across the world have allocated just under 900,000 vaccine doses for nine African countries “hard hit by the current mpox surge,” the Africa CDC said in a statement Tuesday.

The countries include the DRC, Kenya and Uganda.

“The largest number of doses — 85% of the allocation — will go to the Democratic Republic of the Congo as the most affected country, reporting four out of every five laboratory confirmed cases in Africa this year,” the statement said.

Mpox, previously known as monkeypox, is caused by a virus transmitted to humans by infected animals but can also be passed from human to human through close physical contact.

It causes fever, muscular aches and large boil-like skin lesions, and can be deadly.
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Washington — Researchers at Michigan State University recently discovered that honeybees, with their keen sense of smell, can sniff out lung cancer on a patient’s breath.

“Our world is visual. Insects’ world is all based on smell, so their sense of smell is very, very good,” says Debajit Saha, assistant professor of biomedical engineering at Michigan State University, who was part of a team that published research on the discovery last month.

“There is quite a bit of research that shows that when some cancer grows inside our body, our breath actually changes. Our research does show that honeybees can detect lung cancer and possibly other diseases based on the smell of those cells.”

Saha and his team harnessed the bees and attached electrodes to their brains. The insects were then exposed to synthetic compounds that mimicked the breath of a lung cancer patient. Ninety-three percent of the time, the bees could tell the difference between the cancer breath and the artificial breath of a healthy person. The bees could also distinguish between different types of lung cancer.

The discovery could have implications for early detection of many cancers, including lung, breast, head and neck, and colorectal cancers.

“We do think breath-based diagnostics of cancer can be a game changer,” Saha says. “The reason is, many times we detect the cancer late, when the tumor has already grown pretty big. But generally, when cancer starts growing in your body, the breath signature starts changing much earlier.”

He hopes to develop a portable system in which electrodes are implanted in a honeybee brain that a patient will be able to breathe into. This cyborg sensor, which is part-brain, part-engineered, would deliver test results in real time.

“Hopefully, within the next five years, we’ll have something to show that humans can be diagnosed using these insect brain disc sensors,” Saha says.

Using animals to detect cancer isn’t a new concept. At the Penn Vet Working Dog Center at the University of Pennsylvania, researchers are training dogs to recognize certain cancer odors.

“A lot of other animals also have quite intense and capable senses of smell,” says Cindy Otto, executive director of the Penn Vet Working Dog Center. “But part of what makes dogs so good is that they cooperate with humans, and so, they communicate that information.”

The dogs are in a foster program where they live with families and are brought to “work” each day. Not all dogs can do the work, according to Clara Wilson, a postdoctoral researcher at the center.

“If the dog is not really interested in this type of work, we find out pretty quickly. And you can’t make a dog want to do this, because they’re not going to give you high-quality answers,” Wilson says. “They need to love it to be engaged. And so, it’s a really fun game for them.”

Sniffing out cancer might be a game to the animals, but researchers are finding that the animals detect cancer better than machines. A dog’s sense of smell is 10,000 to 100,000 times more acute than that of humans.

“Why are we finding that these dogs are outperforming the computers?” says Amritha Mallikarjun, another postdoctoral researcher at the center. “Well, part of their success is because of this superior sensitivity to detect odor molecules as compared to anything we currently have on the market.”

The researchers hope to continue isolating characteristics of cancer odors to enhance technological development, eventually creating e-noses that duplicate a dog’s cancer sniffing abilities, enabling earlier detection of cancer.

“This may not be the endgame, but I think it’s going to advance the overall approach to diagnosing not only cancer but many other diseases,” Otto says.

“You can look back in history to the Greeks and Romans. The physicians then used odor as part of their diagnostic tools, and I think as modern humans, we’ve kind of let go of that. I think we can really capitalize on that and advance the health of not only humans, but dogs and other species as well.”
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Canada announced Wednesday it won’t block access to the popular video-sharing app TikTok but is ordering the dissolution of its Canadian business after a national security review of the Chinese company behind it.

Industry Minister François-Philippe Champagne said it is meant to address risks related to ByteDance Ltd.’s establishment of TikTok Technology Canada Inc.

“The government is not blocking Canadians’ access to the TikTok application or their ability to create content. The decision to use a social media application or platform is a personal choice,” Champagne said.

Champagne said it is important for Canadians to adopt good cybersecurity practices, including protecting their personal information.

He said the dissolution order was made in accordance with the Investment Canada Act, which allows for the review of foreign investments that may harm Canada’s national security. He said the decision was based on information and evidence collected over the course of the review and on the advice of Canada’s security and intelligence community and other government partners.

A TikTok spokesperson said in a statement that the shutdown of its Canadian offices will mean the loss of hundreds of local jobs.

“We will challenge this order in court,” the spokesperson said. “The TikTok platform will remain available for creators to find an audience, explore new interests and for businesses to thrive.”

TikTok is wildly popular with young people, but its Chinese ownership has raised fears that Beijing could use it to collect data on Western users or push pro-China narratives and misinformation. TikTok is owned by ByteDance, a Chinese company that moved its headquarters to Singapore in 2020.

TikTok faces intensifying scrutiny from Europe and America over security and data privacy. It comes as China and the West are locked in a wider tug of war over technology ranging from spy balloons to computer chips.

Canada previously banned TikTok from all government-issued mobile devices. TikTok has two offices in Canada, one in Toronto and one in Vancouver.

Michael Geist, Canada research chair in Internet and E-commerce Law at the University of Ottawa, said in a blog post that “banning the company rather than the app may actually make matters worse since the risks associated with the app will remain but the ability to hold the company accountable will be weakened.”

Canada’s move comes a day after the election in the United States of Donald Trump. In June, Trump joined TikTok, a platform he once tried to ban while in the White House. It has about 170 million users in the U.S.

Trump tried to ban TikTok through an executive order that said “the spread in the United States of mobile applications developed and owned” by Chinese companies was a national security threat. The courts blocked the action after TikTok sued.

Both the U.S. FBI and the Federal Communications Commission have warned that ByteDance could share user data such as browsing history, location and biometric identifiers with China’s government. TikTok said it has never done that and would not, if asked.

Trump said earlier this year that he still believes TikTok posed a national security risk, but was opposed to banning it.

U.S. President Joe Biden signed legislation in April that would force ByteDance to sell the app to a U.S. company within a year or face a national ban. It’s not clear whether that law will survive a legal challenge filed by TikTok or that ByteDance would agree to sell.
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CHICAGO — For the second year in a row, Earth will almost certainly be the hottest it’s ever been. And for the first time, the globe this year reached more than 1.5 degrees Celsius of warming compared to the pre-industrial average, the European climate agency Copernicus said Thursday.

“It’s this relentless nature of the warming that I think is worrying,” said Carlo Buontempo, director of Copernicus.

Buontempo said the data clearly shows the planet would not see such a long sequence of record-breaking temperatures without the constant increase of greenhouse gases in the atmosphere driving global warming.

He cited other factors that contribute to exceptionally warm years like last year and this one. They include El Nino — the temporary warming of parts of the Pacific that changes weather worldwide — as well as volcanic eruptions that spew water vapor into the air and variations in energy from the sun. But he and other scientists say the long-term increase in temperatures beyond fluctuations like El Nino is a bad sign.

“A very strong El Nino event is a sneak peek into what the new normal will be about a decade from now,” said Zeke Hausfather, a research scientist with the nonprofit Berkeley Earth.

News of a likely second year of record heat comes a day after Republican Donald Trump, who has called climate change a “hoax” and promised to boost oil drilling and production, was reelected to the U.S. presidency. It also comes days before the next U.N. climate conference, called COP29, is set to begin in Azerbaijan. Talks are expected to focus on how to generate trillions of dollars to help the world transition to clean energies like wind and solar, and thus avoid continued warming.

Buontempo pointed out that going over the 1.5 degree Celsius threshold of warming for a single year is different than the goal adopted in the 2015 Paris Agreement. That goal was meant to try to cap warming at 1.5 degrees Celsius since pre-industrial times on average, over 20 or 30 years.

A United Nations report this year said that since the mid-1800s on average, the world has already heated up 1.3 degrees Celsius — up from previous estimates of 1.1 degrees or 1.2 degrees. That’s of concern because the U.N. says the greenhouse gas emission reduction goals of the world’s nations still aren’t nearly ambitious enough to keep the 1.5 degree Celsius target on track.

The target was chosen to try to stave off the worst effects of climate change on humanity, including extreme weather. “The heat waves, storm damage, and droughts that we are experiencing now are just the tip of the iceberg,” said Natalie Mahowald, chair of Earth and Atmospheric Sciences at Cornell University.

Going over that number in 2024 doesn’t mean the overall trend line of global warming has, but “in the absence of concerted action, it soon will,” said University of Pennsylvania climate scientist Michael Mann.

Stanford University climate scientist Rob Jackson put it in starker terms. “I think we have missed the 1.5 degree window,” said Jackson, who chairs the Global Carbon Project, a group of scientists who track countries’ carbon dioxide emissions. “There’s too much warming.”

Indiana state climatologist Beth Hall said she isn’t surprised by the latest report from Copernicus, but emphasized that people should remember climate is a global issue beyond their local experiences with changing weather. “We tend to be siloed in our own individual world,” she said. Reports like this one “are taking into account lots and lots of locations that aren’t in our backyard.”

Buontempo stressed the importance of global observations, bolstered by international cooperation, that allow scientists to have confidence in the new report’s finding: Copernicus gets its results from billions of measurements from satellites, ships, aircraft and weather stations around the world.

He said that going over the 1.5 degree Celsius benchmark this year is “psychologically important” as nations make decisions internally and approach negotiations at the annual U.N. climate change summit Nov. 11-22 in Azerbaijan.

“The decision, clearly, is ours. It’s of each and every one of us. And it’s the decision of our society and our policymakers as a consequence of that,” he said. “But I believe these decisions are better made if they are based on evidence and facts.”
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An initial 899,000 vaccine doses have been allocated for nine countries across Africa that have been hit hard by the current mpox surge, the WHO and other health organizations said on Wednesday.

The WHO declared mpox a global public health emergency for the second time in two years in August after a new variant of the virus, called clade Ib, spread from the Democratic Republic of Congo to neighboring countries.

In September, after facing criticism on moving too slowly on vaccines, the World Health Organization cleared Bavarian Nordic’s BAVA.CO vaccine for mpox and said it was considering LC16, made by Japan’s KM Biologics as a potential vaccine option.

The WHO also set up a scheme to help bring mpox vaccines, tests and treatments to the most vulnerable people in the world’s poorest countries, similar to efforts during the COVID-19 pandemic.

The global health agency said on Wednesday the newly allocated vaccines will go to the Central African Republic, Ivory Coast, the Democratic Republic of Congo, Kenya, Liberia, Nigeria, Rwanda, South Africa and Uganda.

The largest number of doses – 85% of the allocated vaccines – will go to the Democratic Republic of Congo as the most affected country, the WHO said.

The allocated vaccines are from European countries, the United States, Canada and Gavi, a public-private alliance that co-funds vaccine purchases for low-income countries.

According to the latest WHO figures, there have been more than 46,000 confirmed and suspected cases of mpox in Africa this year, and more than 1,000 deaths in the continent due to the viral illness.
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sydney — The Australian government will legislate for a ban on social media for children under 16, Prime Minister Anthony Albanese said on Thursday, in what it calls a world-leading package of measures that could become law late next year.

Australia is trying out an age-verification system to assist in blocking children from accessing social media platforms, as part of a range of measures that include some of the toughest controls imposed by any country to date.

“Social media is doing harm to our kids and I’m calling time on it,” Albanese told a news conference.

Albanese cited the risks to physical and mental health of children from excessive social media use, in particular the risks to girls from harmful depictions of body image, and misogynist content aimed at boys.

“If you’re a 14-year-old kid getting this stuff, at a time where you’re going through life’s changes and maturing, it can be a really difficult time, and what we’re doing is listening and then acting,” he said.

A number of countries have already vowed to curb social media use by children through legislation, though Australia’s policy is one of the most stringent.

No jurisdiction so far has tried using age verification methods like biometrics or government identification to enforce a social media age cut-off, two of the methods being tried.

Australia’s other world-first proposals are the highest age limit set by any country, no exemption for parental consent and no exemption for pre-existing accounts.

Legislation will be introduced into the Australian parliament this year, with the laws coming into effect 12 months after being ratified by lawmakers, Albanese said.

The opposition Liberal Party has expressed support for a ban.

“The onus will be on social media platforms to demonstrate they are taking reasonable steps to prevent access,” Albanese said. “The onus won’t be on parents or young people.”

“What we are announcing here and what we will legislate will be truly world-leading,” Communications Minister Michelle Rowland said.

Rowland said platforms impacted would include Meta Platforms’ Instagram and Facebook, as well as Bytedance’s TikTok and Elon Musk’s X. Alphabet’s YouTube would likely also fall within the scope of the legislation, she added.

TikTok declined to comment, while Meta, Alphabet and X did not respond to requests for comment.

The Digital Industry Group, a representative body that includes Meta, TikTok, X and Alphabet’s Google as members, said the measure could encourage young people to explore darker, unregulated parts of the internet while cutting their access to support networks.

“Keeping young people safe online is a top priority … but the proposed ban for teenagers to access digital platforms is a 20th Century response to 21st Century challenges,” said DIGI Managing Director Sunita Bose.

“Rather than blocking access through bans, we need to take a balanced approach to create age-appropriate spaces, build digital literacy and protect young people from online harm,” she added.

France last year proposed a ban on social media for those under 15, though users were able to avoid the ban with parental consent.

The United States has for decades required technology companies to seek parental consent to access the data of children under 13, leading to most social media platforms banning those under that age from accessing their services.
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