BACKGROUND Kidney transplant recipients (KTR) have impaired immune responses to vaccination and remain at increased risk for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection despite mRNA coronavirus disease 2019 (COVID-19) vaccination. Data from rural and medically underserved transplant populations remain limited. AIM To evaluate serologic response to a two dose mRNA SARS-CoV-2 vaccination series and identify clinical factors associated with antibody response in KTR. METHO