Flu A and flu B are two different strains of influenza, explains Thomas Russo, M.D., professor and chief of infectious ...

The winter flu season features two types of influenza. Here's what you need to know about them and how they differ.

(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 ...

The US Centers for Disease Control and Prevention is urging hospitals to accelerate advanced testing of people they suspect may have bird flu.

Flu cases are surging across the country – more than half of states are now at "very high" levels, the most severe ...

The agency says labs should accelerate testing on patients hospitalized with the flu within 24 hours of their admission.

1968-1977 (group 2 [G2]; n = 49; mean age, 48.4 years); likely primed by A(H3N2) subtype clade 2 virus. 1978-1997 (group 3 [G3]; n = 40; mean age, 35.1 years), likely primed by A(H3N2) and A(H1N1 ...

The bird flu, H5N1, is a subtype of flu A. However, nearly all seasonal flu going around right now is also flu A, particularly the H3N2 and H1N1 subtypes. The way to determine what subtype of flu ...