Influenza, commonly known as the flu, is a contagious respiratory illness caused by the influenza virus. According to the Centers for Disease Control and Prevention (CDC), there are four types of flu ...
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What Is the Difference Between Flu A and Flu B?
Medically reviewed by Kate Colby, MPH Flu A affects both humans and animals, while flu B affects only humans. You may notice that flu A tends to appear earlier in the flu season than flu B. You can ...
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. On ...
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