Reports that cows have been infected despite farmers' preventive measures indicate there are multiple routes of transmission ...

Officials have discovered the virus in 645 dairy herds, more than in any other state so far. In a stark acknowledgment of the ...

Los Angeles County health officials have identified three more cats with presumptive H5N1; the source of the virus has not ...

The CDC determined the person was likely exposed to H5N1 from sick or dead birds in a backyard flock ... The CDC has not yet ...

California officials have declared a state of emergency over the spread of bird flu, which is tearing through dairy cows in ...

A patient in Louisiana was hospitalized after a recent exposure with the CDC issuing guidance to those most at-risk of infection.

The U.S. Centers for Disease Control and Prevention says a patient has been hospitalized with a severe case of H5N1 infection ...

The first severe case of H5N1 bird flu was confirmed in Louisiana. Here is a map of other states that have been affected.

Medscape Medical News spoke with the CDC expert on the current H5N1 situation in the United States and ongoing surveillance ...

A Louisiana patient is critically ill with severe respiratory symptoms from H5N1 bird flu, marking the 61st U.S. human case ...