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Uploaded by bfcbfia on May 12, 2010
An outbreak of avian flu mutates into a virus that becomes transmittable from human to human.
Film & Animation
Standard YouTube License
What's so special about the number 20? How is 20 infected people containable but 21 is not?
wpaxton 5 months ago
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What's so special about the number 20? How is 20 infected people containable but 21 is not?
wpaxton 5 months ago