A virologist explains that why this probably isn’t the big one — but that it’s a sign of bad things happening with the virus.

Federal health officials have confirmed unsettling new details about the first United States case of severe bird flu, ...

Cases of norovirus and bird flu are on the rise compared to last year, according to data from the CDC. Several states have experienced over 10 confirmed outbreaks of norovirus, a contagious virus that ...