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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
An adenovirus, which can cause the common cold, as well as bronchitis and pneumonia. (Getty Images)
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