The 2009 (H1N1) Pandemic First isolated from humans in Mexico and the USA. Caused approximately 0.5–1 million deaths worldwide. Shared striking similarities with the 1918 pandemic virus.
The researchers also suggest that the seasonal H1N1 flu virus that began circulating after the 1918 pandemic ended (and continued to circulate until supplanted by the 1957 H2N2 pandemic flu) is the ...
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