Humoral immunity against SARS‐CoV‐2 variants including omicron in solid organ transplant recipients after three doses of a COVID‐19 mRNA vaccine

Abstract

Only a small subgroup of solid organ transplant recipients is able to generate functional antibodies after an initial vaccine series; however, an additional vaccine dose resulted in dramatically improved antibody responses against all SARS-CoV-2 variants except omicron where antibody responses and neutralising activity remained suboptimal.