One in three infected dairy herds in the U.S. are now in California, according to federal tallies of bird flu in livestock.

Two California dairy workers have been infected with bird flu, state and federal health officials announced late Thursday. The cases mark California’s first human infections amid outbreaks ...

Two dairy workers in California were infected with bird flu, the 15th and 16th human cases detected in the U.S. this year.

Two dairy workers in California were infected with bird flu, the 15th and 16th human cases detected this year in an ongoing outbreak affecting the nation's dairy cows.

Six people have contracted bird flu in California amid outbreaks in the state’s dairy industry, officials confirmed Friday. On Thursday, officials confirmed a fourth person was infected and were ...

Two California dairy workers confirmed to have been infected with avian flu worked at farms in Tulare County, health officials said in an update.

Two dairy workers in California were infected with bird flu, the 15th and 16th human cases detected this year in an ongoing outbreak affecting the nation's dairy cows, health officials said Thursday.

Two dairy workers in California were infected with bird flu, the 15th and 16th human cases detected this year in an ongoing outbreak affecting the nation’s dairy cows, health officials said ...

Two dairy workers in California were infected with bird flu, the 15th and 16th human cases detected this year in an ongoing outbreak affecting the nation's dairy cows, health officials said Thursday.

Two dairy workers in California were infected with bird flu, the 15th and 16th human cases detected this year in an ongoing outbreak affecting the nation's dairy cows, health officials said Thursday.

Two dairy workers in California were infected with bird flu, the 15th and 16th human cases detected this year in an ongoing outbreak affecting the nation's dairy cows, health officials said ...