The United States is in the grip of an aggressive winter flu season, with the U.S. Centers for Disease Control and Prevention (CDC) having recently reported a surge in visits to doctors on a scale not ...

(NEXSTAR) – The flu is spreading far and wide across the U.S. – and influenza A is largely to blame. Of all the flu tests reported to the Centers for Disease Control and Prevention since the start of ...

Highly pathogenic avian influenza A(H5N1) viruses have been circulating among wild birds and are enzootic in poultry in some areas of the world with spillover to a wide range of terrestrial and marine ...

An international research team studying mice and human tissue samples has uncovered why older people are more likely to suffer severely from the flu and suggest that their findings could be used to ...

Massachusetts is in the midst of a sharp flu surge, with cases and hospitalizations climbing faster than usual for this point in the season. State health officials say low vaccination rates and a ...