Veterinary Sciences TomorrowDiarsipkan 2009-05-06 di Wayback Machine. article Swine influenza: a zoonosis by Paul Heinen dated 15 September 2003 says "Influenza B and C viruses are almost exclusively isolated from man, although influenza C virus has also been isolated from pigs and influenza B has recently been isolated from seals."
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Veterinary Sciences TomorrowDiarsipkan 2009-05-06 di Wayback Machine. article Swine influenza: a zoonosis by Paul Heinen dated 15 September 2003 says "Influenza B and C viruses are almost exclusively isolated from man, although influenza C virus has also been isolated from pigs and influenza B has recently been isolated from seals."