The United States is seeing a second peak in flu cases this season. After doctor’s office visits for flu dipped early this ...

The seasonal flu in California is surging to levels not seen in several years — though the reasons why aren’t entirely clear. Test positivity for influenza specimens at state laboratories hit 26% in ...

RSV, respiratory syncytial virus, usually peaks in December and January while infecting the nose, throat and lungs, usually ...

H5N9 is “not commonly seen in poultry in general,” says Eman Anis, assistant professor at the University of Pennsylvania ...

N ow that bird flu has been detected in animals in all 50 states, and nearly 70 cases have been confirmed in people, health ...