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. Author manuscript; available in PMC: 2012 Apr 1.
Published in final edited form as: Biol Blood Marrow Transplant. 2010 May 8;17(4):524–533. doi: 10.1016/j.bbmt.2010.04.015

Figure 2. Hemagglutination inhibition assay (HAI) measure of neutralizing antibody (NAb) levels in healthy subjects pre- and post-vaccination for the 2007–2008 flu season.

Figure 2

Healthy subject sera was tested for NAb titer at d0 and at d180 post-vaccination. NAb titers measured were against the 2007–2008 flu vaccine antigens (A)H1N1, (A)H3N2 and (B)Malaysia flu strains. Black error bars represent the standard deviation from the mean (dashed bar). The dotted black line represents a titer of 40 which is considered protective. ***=p<.001, p = two-tailed Mann-Whitney test.