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Fig. 1 | Immunity & Ageing

Fig. 1

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. 1

Study design. High dose (HD) inactivated trivalent influenza vaccine (IIV3) administration and specific influenza virus strains included in the vaccine formula (gray horizontal bar) are shown in each study season. Pre-vaccination strain-specific hemagglutination inhibition (HAI) antibody titers were measured using current season vaccine strain antigens (routine approach, green bar) and prior season vaccine strain antigens (orange bar)

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Immunity & Ageing

ISSN: 1742-4933

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