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What is the common cold?

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Sneezing, scratchy throat, runny nose -- everyone knows the first signs of a cold, probably the most common illness known. These symptoms are usually caused by a viral infection. Although the common cold is usually mild, with symptoms lasting one to two weeks, it is a leading cause of doctor visits and missed days from school and work.

From: Common Cold WebMD Medical Reference

SOURCES: CDC. 

Reviewed by Carol DerSarkissian on February 28, 2018

SOURCES: CDC. 

Reviewed by Carol DerSarkissian on February 28, 2018

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How common is the common cold?

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