Volume 29, Number 1—January 2023
Research
Human Immunity and Susceptibility to Influenza A(H3) Viruses of Avian, Equine, and Swine Origin
Figure 2

Figure 2. Number of positive human serum samples in the hemagglutination inhibition assay (titer >40) for each test virus compared with the total number of samples tested per birth cohort. Birth cohorts are represented by colors. A total of 286 serum samples collected during August 2017–January 2018 from immunocompetent persons in Belgium were tested. Complete isolate names are provided in [[ANCHOR###T2###Table 2###Anchor]].