Apoorva Mandavilli

Huge die-offs of elephant seals occurred after the virus gained nearly 20 troublesome new mutations, scientists found

And the new research findings hold a warning: H5N1 may similarly transform to cause large-scale infections in other mammalian species, including people.

There is no guarantee that a person-to-person virus would be benign, scientists say, and vaccines and treatments at hand may not be sufficient.

The bird flu outbreak in dairy cattle has so far spilled over to just three farmworkers in the United States, as far as public health authorities know.

Growing concern that as H5N1 continues to infect mammals and evolve, it may pick up the mutations needed to spread efficiently among people, setting off another pandemic

Evidence shows the H5N1 bird flu virus could evolve to spread among humans, with current vaccines and treatments possibly insufficient.

All Americans ages 6 months and older should receive one of the new COVID-19 vaccines when they become available this fall, the Centers for Disease Control and Prevention said Thursday.

Climate change and contaminated water have combined to create an epidemic of kidney disease.

Rising temperatures and contaminated water have led to an epidemic of kidney disease among young men in Sri Lanka's farming and fishing communities.

Thousands of cows have been tested, and farmworkers are being monitored, but only about 60 people have been tested for bird flu. There are several reasons for this.