Kidney transplant recipients Aged 18-80 years Have received 2 doses of a COVID-19 vaccine regimen (either adenoviral vector or mRNA-based) and have demonstrably not responded (undetectable anti-spike protein antibodies) or low response (anti-RBD antibody titre < 100 U/mL)

Kidney transplant recipients Aged 18-80 years Have received 2 doses of a COVID-19 vaccine regimen (either adenoviral vector or mRNA-based) and have demonstrably not responded (undetectable anti-spike protein antibodies) or low response (anti-RBD antibody titre < 100 U/mL)