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Flu Attack! How A Virus Invades Your Body | Krulwich Wonders | NPR
3:39
YouTubeNPR
Flu Attack! How A Virus Invades Your Body | Krulwich Wonders | NPR
When you get the flu, viruses turn your cells into tiny factories that help spread the disease. In this animation, NPR's Robert Krulwich and medical animator David ...
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