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Baseline antibody profiles by age‐groups against A/California/072009pdm before (June 2009) the first influenza A(H1N1) pandemic wave in Selenghe province, Mongolia. (A) Antibody prevalence by age‐groups measured by Hemagglutinin inhibition (HI) test () and Microneutralization (MN) test (•). (B) Geometric mean titers by age‐groups measured by HI test () and MN test (•). Error bars represent 95% confidence interval.
