STUDIES IN HUMAN IMMUNIZATION AGAINST INFLUENZA : DURATION OF IMMUNITY INDUCED BY INACTIVE VIRUS.

J Exp Med · 1944 · PMC2135471 · PMID 19871414

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highly significantno p-value reported

there be at least a fourfold rise in titer in two of the following three serologicaltests: Agglutination inhibitiontiter with PR8 and NY-43, and complement fixation titer with NY-43. Sera from individualsincluded as cases in the study, taken 4 to 8 weeks after the acute illness. are consistent, is highly significant.

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