recipient(2) acute respiratory syndrome(2) tested(2) COVID-19(2) kidney transplant(2) Patient(2) solid organ transplant(2) recipients(2) Transplant(2) positive(2) Critical(2) Factor(1) screening test(1) mRNA-1273 vaccine(1) populations(1) required(1) diagnostic test(1) conducted(1) Solid(1) Coronavirus disease 2019(1) Testing(1) Organ transplant(1) Cohort(1) morbidity and mortality(1) donors(1) SOT(1) content(1) HCW(1) Moderna(1) white(1)