Originally found mostly in wild birds and poultry, H5N1 clade 2.3.4.4b, genotype D1.1, was discovered in dairy cattle last ...

A strain of bird flu spreading among dairy cows in Nevada has now infected a worker in the state, according to reports from ...

New variants of bird flu are turning up in dairy cattle. But some states still aren't a part of a federal milk supply testing ...

Three of America’s top milk-producing states are not participating in the U.S. Department of Agriculture’s program designed to catch the spread of the virus.

The Central Nevada Health District has reported the first confirmed case of H5N1 avian flu in a human within the state.

The case broadens the U.S. outbreak of the virus that has infected nearly 70 people, mostly farm workers, since April.

A Nevada dairy worker has become the first human known to be infected with a new version of bird flu from a dairy herd.

The worker was infected with a type of bird flu that’s different from the version that has been spreading in U.S. herds since ...

A second type of bird flu has been found in U.S. dairy cows for the first time, the U.S. Department of Agriculture announced.

When bird flu first appeared, it was thought to be a risk primarily to birds and was felt unlikely to infect people. Infecting birds is bad enough: the current outbreak among chickens has been a major ...

Migrant farmworkers are on the front lines of the H5N1 surge — but deportation fears complicate virus surveillance ...

Across the country, dairy producers have dumped milk and infected chickens have been killed, including millions of egg-laying ...