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How a cold develops

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Uploaded on Apr 17, 2009

PLEASE NOTE THIS VIDEO IS OUT-OF-DATE.
See the new version: http://www.youtube.com/watch?v=q7PRFR...

A cold is an infection caused by a virus. It's a common and usually mild illness that affects the nose and throat.Find out more here: http://bit.ly/KV8y1c

The content is intended for general information only and does not replace the need for personal advice from a qualified health professional.

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