Science Trek

D4K: Viruses Video Short

Clip: Special | 3m 17s Video has closed captioning.

What is a virus? Where do they reside? How do they get into your body and what happens then. Viruses have changed human history. Find out more about these microscopic organisms.

Aired: 11/21/06

Rating: TV-G

Problems Playing Video? | Closed Captioning

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