This study will enroll individuals who have:
- Completed a primary series of either the Moderna messenger RNA (mRNA) based coronavirus infectious disease 19 (COVID-19) vaccine or the Pfizer-BioNTech mRNA based COVID-19 vaccine, and
- An antibody response ≤ 2500 U/mL measured at least 30 days after the last dose of vaccine.
This group of patients is at high risk for severe COVID-19 disease due to pharmacologic immunosuppression and a high prevalence of non-transplant risk factors such as obesity and diabetes.
A Randomized Study to Evaluate Antibody Response to an Additional Dose of SARS-CoV-2 Vaccination With and Without Immunosuppression Reduction in Kidney and Liver Transplant Recipients
This study is a randomized, open-label multi-site trial designed to induce an enhanced antibody response to severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2) in kidney and liver transplant recipients who have ≤ 2500 U/mL anti-spike antibody (as measured by the Roche Elecsys® anti-SARS-CoV-2 S assay) after a completed primary series (3 doses) of mRNA COVID-19 vaccines.
Participants will be randomized to either:
- Receive a study dose of mRNA based COVID-19 vaccine (booster) with no change in their immunosuppressive regimen, or
- Undergo a temporary, prescribed reduction in their maintenance immunosuppression (IS) regimen and receive a study dose (booster) of mRNA-based COVID-19 vaccine.
Protocol Version 6.0 will include a booster dose of either Pfizer Bivalent COVID-19 Vaccine or Moderna Bivalent COVID-19 Vaccine, with or without IS reduction.
Duration of study participation for interested and eligible individuals: 13 months.