Omicron Neutralizing Antibody Response following Booster Vaccination Compared with Breakthrough Infection

99 individuals were semi-randomly selected from a larger vaccination cohort following vaccination and in some cases breakthrough infection. They analyzed spike receptor-binding domain-specific IgG, IgA, and IgM by enzyme-linked immunosorbent assay, neutralizing antibody titers against live SARS-CoV-2 variants, and antibody-depended cell-mediated phagocytosis.