Fig. 2From: Self-reported diabetes and herpes zoster are associated with a weak humoral response to the seasonal influenza A H1N1 vaccine antigen among the elderlyVenn diagram showing common and distinct humoral responses to the three antigens contained in the vaccine (i.e. A H1N1, A H3N2 and B). Percent values do not sum up to 100%; 71 (35.5%) participants had an adequate response to all three antigensBack to article page