Image Library (PHIL), http://phil.cdc.gov/Phil/details.asp English Influenzaviruses under an electron microscope Bulgarian Грипни вируси под електронен
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reconstructed virusof the 1918 Spanish Flu applies to jurisdiction: United States of America determination method: work of the federal government of the United
as the original. https://creativecommons.org/licenses/by-sa/3.0CC BY-SA 3.0 Creative Commons Attribution-Share Alike 3.0 truetrue English of: Wikipedia