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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 transmission electron microscope image of flu virus particles. (Getty Images)
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