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. Author manuscript; available in PMC: 2018 Mar 16.
Published in final edited form as: J Infect Dis. 2018 Mar 13;217(7):1078–1088. doi: 10.1093/infdis/jiy013

Figure 1.

Figure 1

A, Hemagglutinin inhibition (HAI) antibody titers and B, neutralizing antibody titers over time for critically ill adolescents and adults hospitalized with influenza A(H1N1)pdm09 virus infection — Canada, 2009–2011. Average curve was estimated among 25 survivors with ≥3 blood draws and at least one acute phase draw, collected ≤10 days after illness onset, using an unadjusted cubic linear mixed model. Individual lines are shown for all 47 enrolled patients with laboratory-confirmed influenza A(H1N1) pdm09 virus infection.