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Fig. 3 | Immunity & Ageing

Fig. 3

From: Interseason waning of vaccine-induced hemagglutination inhibition antibody titers and contributing factors to pre-existing humoral immunity against influenza in community-dwelling older adults 75 years and older

Fig. 3

Relationships between current season pre-vaccination HAI titers (residual) and prior season post-vaccination HAI antibody titers. Associations of pre-vaccination HAI antibody titers with prior season post-vaccination HAI titers were evaluated in univariate analyses. A IAV-H3N2: Spearman correlation coefficient between 2014–2015 (n = 49) was 0.72 and that between 2015–2016 (n = 52) was 0.82, p < .01 for both; B IBV: Spearman correlation coefficient for between 2014–2015 (n = 49) was 0.89 and that between 2015–2016 (n = 52) was 0.80, p < .01 for both; C IAV-H1N1: Spearman correlation coefficient between 2016–2017 (n = 78) was 0.66, p < .01

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Immunity & Ageing

ISSN: 1742-4933

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