The flu is simple, right? You get it from germs, it feels terrible and then you get better.

Turns out there’s a bit more going on.

Every year, millions of people will get sick from the flu—but many don’t know how it works or spreads or what they can do to prevent it.

Christopher Hurt, MD, assistant professor of infectious diseases at the UNC School of Medicine, explains the science behind the flu and how you can stay healthy this flu season.

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Originally published December 5, 2018.