The winter flu season features two types of influenza. Here's what you need to know about them and how they differ.
3hon MSN
Influenza levels in the US are the highest they've been in 15 years amid winter weather and a second wave of the virus.
Levels of influenza nationwide are now at the highest they have been since the peak of the 2009 swine flu pandemic, according ...
The U.S. winter virus season is in full force, and by one measure is the most intense in 15 years.
Flu A and flu B are two different strains of influenza, explains Thomas Russo, M.D., professor and chief of infectious ...
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