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

When, where and how the H5N1 bird flu virus may evolve and its capacity to spark a pandemic is hard to predict — in part, ...

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 ...

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

Today, the Louisiana Department of Health (LDH) announced the state's first presumptive human H5N1 highly pathogenic avian ...

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

A child who is believed to be infected with H5N1 may have caught the virus from drinking raw milk, health officials said on ...

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

The bird flu outbreak has spread to all 50 states, these maps show. Here are the symptoms and what to do if you think you ...