History of Vaccines
A Vaccine History Project of The College of Physicians of Philadelphia
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2009 H1N1 'Swine flu'
Description:
Negative stain electron microscope image of the 2009 H1N1 Influenza A/CA/4/09 (This signifies an H1N1 strain of Influenza A that was circulating in California in 2009.)
Copyright:
CDC / C.S. Goldsmith and A. Balish
