Swine Flu, the second wave

[Destrus]

i think one of the links did say that it originated in pigs or something along those lines but contains strains of all three.

i googled:

Schuchat said Thursday that the virus in the United States is influenza A N1H1 mixed with swine influenza viruses. The virus contains genetic pieces from four different flu viruses -- North American swine influenza, North American avian influenza, human influenza viruses and swine influenza viruses found in Asia and Europe, she said.

http://www.forbes.com/feeds/hscout/2...out626461.html