What happened
The U.S. Department of Agriculture said Wednesday that a second type of H5N1 bird flu had infected U.S. dairy herds, suggesting that cattle are more susceptible to the avian virus than previously believed and putting dairy workers at greater risk.
Who said what
The new H5N1 version, known as D1.1, was found in dairy cattle in Nevada and is different than the B3.13 type that has spread to more than 950 herds in 16 states over the past year, starting in Texas. The D1.1 infection was discovered by testing raw milk under a USDA dairy surveillance project launched last year.
"I always thought one bird-to-cow transmission was a very rare event," said Richard Webby, an influenza expert at St. Jude Children's Research Hospital, said to The New York Times. That it happened twice is "a little bit of a 'wow' to me." Most of the 67 people diagnosed with bird flu in the U.S. had mild symptoms and had worked with dairy or cattle, but the one known death was an elderly man infected with D1.1 after contact with wild and backyard birds.
The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.
Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
What next?
"There does not appear to be an immediate change to human risk," already considered low for the general public, The Washington Post said. But it's important for federal officials to be vigilant and transparent about a virus that could "make Covid seem like a walk in the park," said Michael Worobey, a University of Arizona evolutionary biologist.
-
Quit-smoking ads are being put outUnder the radar The dissolution of a government-funded campaign could lead to more smokers in the future
-
Sloth fever shows no signs of slowing downThe explainer The vector-borne illness is expanding its range
-
Texas declares end to measles outbreakSpeed Read The vaccine-preventable disease is still spreading in neighboring states, Mexico and Canada
-
RFK Jr. shuts down mRNA vaccine funding at agencySpeed Read The decision canceled or modified 22 projects, primarily for work on vaccines and therapeutics for respiratory viruses
-
Forever chemicals were found in reusable menstrual products. That is nothing new for women.Under the Radar Toxic chemicals are all too common in such products
-
Food may contribute more to obesity than exerciseUnder the radar The devil's in the diet
-
Not just a number: how aging rates vary by countryThe explainer Inequality is a key factor
-
Children's health has declined in the USThe Explainer It's likely a sign of larger systemic issues
