Teach Cough Hygiene Everywhere/Basic info on viruses

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This module helps you whiz through the corresponding chapter on the Wikibook.


Is flu always viral? What distinguishes viruses from bacteria? Why is flu called HxNx?

Supplemental reading: http://www.nytimes.com/2012/03/06/health/amateur-biologists-are-new-fear-in-making-a-mutant-flu-virus.html?scp=4&sq=flu&st=cse