Fig. 2From: Unexpectedly higher levels of anti-orthopoxvirus neutralizing antibodies are observed among gay men than general adult populationComparisons of neutralizing antibody responses against vaccinia virus (Tiantan strain). The neutralizing antibody responses against vaccinia virus (Tiantan strain) were tested using a method of plaque reduction neutralization test. The inhibition rates (A) and the percentages of individuals with a PRNT50 ≥ 30 (B) were compared among groups. Statistical analyses were performed by the method of non-parametric t test (A) or Chi-square test (B)Back to article page