Fig. 1: Spike-specific antibody responses are boosted after third vaccine. | Nature Aging

Fig. 1: Spike-specific antibody responses are boosted after third vaccine.

From: Strong peak immunogenicity but rapid antibody waning following third vaccine dose in older residents of care homes

Fig. 1

a, Wuhan spike-specific antibody titer after 2 or 3 COVID-19 vaccine doses in relation to prior infection status and in staff or resident groups. Red dots indicate participants with prior natural infection and black dots indicate non-infected donors. Age is shown as <65 or >65 years and separates staff and residents. Kruskal–Wallis (uncorrected Dunn’s test), *P = 0.05, ****P < 0.0001, n = 863. The black line indicates the median antibody titer. b, Spike-specific antibody titer in relation to donor age. Red dots indicate participants with prior natural infection (PI; Spearman’s correlation r = 0.13, P = 0.053, n = 198) and black dots indicate those with no prior infection (NPI; two-tailed Spearman’s correlation r = −0.21, P = 0.01, n = 145). All fitted lines are linear regressions.

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