Inclusion Criteria:  Participant is willing and able to give informed consent for participation in the study First or repeat kidney transplant recipient Negative or low positive antibody titer on SARS-CoV-2 antibody assay On a mycophenolate or azathioprine based immunosuppressive regimen > 6 months post-transplant  Exclusion Criteria:  Pregnancy Contraindication to SARS-CoV-2 vaccination (severe allergic reactions or anaphylaxis)