Levels of influenza nationwide are now at the highest they have been since the peak of the 2009 swine flu pandemic, according to figures published Friday by the Centers for Disease Control and ...

(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 ...

Cases of the flu viruses continue to surge across the U.S., placing a strain on health care systems and causing tens of millions of illnesses and thousands of deaths each year. Each flu season ...

It's flu season right now, and the U.S. is in the midst of a wave that's straining hospitals. But not all influenza is the same. There are some notable differences between flu A and flu B strains.