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Cold and Flu Up Close

An up-close and colorful look at the viruses the wreak havoc in the winter.

Colorful Flu and Cold Viruses

Colorful Flu and Cold Viruses
Colorful Flu and Cold Viruses
Colorful Flu and Cold Viruses
Colorful Flu and Cold Viruses
Colorful Flu and Cold Viruses
Colorful Flu and Cold Viruses
Colorful Flu and Cold Viruses
Colorful Flu and Cold Viruses
Colorful Flu and Cold Viruses
A cell infected with the influenza virus, which lands roughly 200,000 Americans in the hospital each year, according to the U.S. Centers for Disease Control and Prevention. (Getty Images)
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