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. 2017 Dec 22;217(1):3–11. doi: 10.1093/infdis/jix546

Figure 2.

Figure 2.

Influenza A virus (IAV)– and influenza B virus (IBV)–specific hemagglutination inhibition (HI) responses in selected subjects. HI titers against representative influenza A(H1N1), influenza A(H3N2), influenza B/Vic, and influenza B/Yam viruses circulating in the relevant seasons were determined for 41 selected subjects in the scope of another study. Subjects were categorized as B/Vic (n = 18; A) or B/Yam (n = 23; B) responders. A, HI antibodies against B/Vic were detected in all responders; 15 of 18 subjects reached HI titers of ≥40. HI titers of ≥40 specific for B/Yam were not detected. B, HI antibodies against B/Yam were detected in 23 of 23 subjects; all reached HI titers of ≥40. HI titers of ≥40 specific for B/Vic were not detected.