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H1N1 or H3N2 virus has been isolated, but convalescent sera have negative or low H1 titers. Why?

April 26, 2017Convalescent H1 h1n1 h3n2 low negative sera titers virus

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H1N1 or H3N2 virus has been isolated, but convalescent sera have negative or low H1 titers. Why?

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A Timing is important when collecting convalescent sera and identifying the correct population. Samples should be collected four weeks after the onset of SIV infection, and they should come from pigs known to have clinical disease.