Keywords: Swine influenza symptoms on swine-en.svg ValidSVG Illustration of antigenic shift Swine_virus svg 2009-05-01 19 40 UTC Swine_virus svg AntigenicShift_HiRes png National Institute of Allergy and Infectious Diseases NIAID Original uploader was Zedla at http //en wikipedia org en wikipedia Converted to PNG by Fvasconcellos derivative work Yug <small><font style color green; > talk </font></small> Other versions/Swine influenza symptoms on swine translation possible Add legends Yug Swine_virus svg PD-USGov original upload log This image is a derivative work of the following images File Swine_virus svg licensed with PD-USGov 2009-05-01T18 09 31Z Yug 1500x1000 1391601 Bytes <nowiki>white background 2try smaller virus </nowiki> 2009-05-01T18 07 30Z Yug 1500x1000 1391280 Bytes <nowiki>white backgroung smaller virus </nowiki> 2009-05-01T17 51 16Z Yug 1522x1013 1392119 Bytes <nowiki> Illustration of antigenic shift 2009-05-01 18 50 UTC en National </nowiki> Uploaded with derivativeFX SVG files on swine flu |