Fig. 1From: Low humoral immune response to the BNT162b2 vaccine against COVID-19 in nursing home residents undergoing hemodialysis: a case–control observational studyLevels of anti-spike protein immunoglobulin G (IgG) antibody against SARS-CoV-2 in healthy control and nursing home residents at 3 weeks after the first dose, 2 weeks after the second dose, and 3 weeks after the second dose. Compared to the healthy control, the nursing home residents showed lower IgG level at each point (p < 0.001)Back to article page