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. 2019 Dec 16;71(12):3096–3102. doi: 10.1093/cid/ciz1198

Figure 2.

Figure 2.

Distribution of antibody titers. PVN IC95 titers (A) and NAI IC50 titers (B) for individuals who tested positive (H3N2+) or negative (H3N2) for H3N2 by polymerase chain reaction and housing controls, analyzed combined and separately. Bars show the number of individuals with titers indicted on the x-axis. IC95 and IC50 are the antibody titers required to inhibit 95% or 50% percent of the input infectivity for PVN or NAI activity for NAI. Abbreviations: NAI, neuraminidase inhibition; PVN, pseudovirus neutralization.