It’s getting close to that time of the year again, when the flu starts to wreak havoc. And so, with the help of NPR’s Robert Krulwich and medical animator David Bolinsky , we’re taking an animated look at what actually happens when a virus invades your body and tricks a single cell into making a million more viruses, and how your immune system eventually deals with the whole mess. It’s a nice demystification of phenomena that affects our everyday lives. If you feel inclined to get a flu shot after watching this clip, I can’t say that I blame you.

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