http://www.cdc.gov/flu/avian/gen-info/flu-viruses.htm
It presents information on the influenza viruses, types, subtypes and strains, the difference between human and avian viruses and how they could change.
Originator(s): Department of Health and Human Services. Center for Disease Control and Prevention - CDC
Resource added in:
13/10/2005
Available languages:
English
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