Influenza hemagglutination inhibition assay

Centers for Disease Control and Prevention have determined that some adults have serum cross-reactive antibodies to the new influenza H1N1 virus. One of the techniques used to reach this conclusion is the hemagglutination inhibition (HI) assay. How does this assay work? To understand the HI assay, we must discuss the hemagglutination assay. Influenza virus particles …

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Adults have cross-reactive antibodies to A/California/04/2009 (H1N1)

Does previous exposure to influenza H1N1 viruses, either by infection or vaccination, provide any protection against infection with the new H1N1 influenza virus strains? The answer to this question might provide insight as to why over 60% of confirmed cases of influenza caused by the swine-like H1N1 viruses in the US are in 5- to …

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