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. 2010 Oct;16(10):1587–1590. doi: 10.3201/eid1610.100665

Figure.

Figure

Percent of pigs with antibodies against pandemic (H1N1) 2009 virus and swine influenza virus (H1N1) detected by hemagglutination-inhibition test, by pig type, Thailand. Serum samples were obtained from pigs of different ages in January 2010. Samples were positive when titer was >40.