Virus

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Infection (Virus, Bacteria & Other Causes)


Virus Definition by Healthwise:

Virus

A virus is a microscopic organism that causes infection and disease. Viral illnesses can range from mild to severe, including examples such as the common cold, West Nile virus, polio, and smallpox.

Author: Jeannette Curtis
Medical Review: Patrice Burgess, MD - Family Medicine
Adam Husney, MD - Family Medicine
Kathleen Romito, MD - Family Medicine
Last Updated: May 25, 2007

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