Antibody blood test results expected later this month may help answer a crucial question: Is there human-to-human ...

California health officials yesterday announced the state's second H5N1 avian flu infection in a dairy farm worker who had no ...

Among the 112 workers, 18 were considered to have had higher risk interactions because they occurred before the patient tested positive for flu and therefore before “droplet precautions” were ...

In what could be the first cases of bird flu spreading between humans in the United States, a group of potential H5N1 infections in Missouri has now grown to eight.