Third Dose of Moderna COVID-19 Vaccine in Transplant Recipients
![]() |
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT04885907 |
Recruitment Status :
Completed
First Posted : May 13, 2021
Last Update Posted : August 2, 2022
|
- Study Details
- Tabular View
- No Results Posted
- Disclaimer
- How to Read a Study Record
Condition or disease | Intervention/treatment | Phase |
---|---|---|
Vaccine Response Impaired Immune Suppression Covid19 | Biological: mRNA-1273 vaccine Other: Normal Saline Placebo | Phase 4 |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 120 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Intervention Model Description: | Randomised, placebo-controlled trial |
Masking: | Double (Participant, Care Provider) |
Masking Description: | Participant and vaccinator will be blinded to vaccine vs placebo |
Primary Purpose: | Prevention |
Official Title: | A Randomised, Blinded, Controlled Trial of a Third Dose of Moderna COVID-19 Vaccine Versus Placebo in Solid Organ Transplant Recipients |
Actual Study Start Date : | May 25, 2021 |
Actual Primary Completion Date : | July 30, 2021 |
Actual Study Completion Date : | August 30, 2021 |

Arm | Intervention/treatment |
---|---|
Active Comparator: Experimental group
Participants will receive a one dose of mRNA-1273 vaccine 0.5mL i.m. in deltoid muscle
|
Biological: mRNA-1273 vaccine
COVID vaccine 3rd dose
Other Name: Moderna COVID-19 vaccine |
Placebo Comparator: Comparator Group
Participants will receive one dose of normal saline injection 0.5mL i.m. in deltoid muscle
|
Other: Normal Saline Placebo
Normal Saline Placebo |
- anti-RBD antibody titer [ Time Frame: 4-6 weeks after intervention ]Percentage of patients that achieve anti-RBD of >=100 U/mL in each arm
- Adverse events [ Time Frame: 7 days after intervention ]Percentage of patient with local and systemic adverse events
- T-cell response [ Time Frame: 4-6 weeks after intervention ]Proportion of participants with an increase in polyfunctional T-cell response compared to pre-vaccination
- SARS-CoV-2 infection [ Time Frame: 6 months after intervention ]Number of patients with microbiologically proven infection
- Rejection [ Time Frame: 4 weeks after intervention ]Proportion of patients with biopsy-proven or clinically treated graft rejection

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Solid organ transplant recipient who has previously received Moderna vaccine at 0 and 1 months
- Able to provide informed consent
Exclusion Criteria:
- Anaphylaxis or allergic reaction to Moderna vaccine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04885907
Canada, Ontario | |
University Health Network, Toronto General Hospital | |
Toronto, Ontario, Canada, M5G 2N2 | |
University Health Network, Toronto General Hospital, Multi-Organ Transplant | |
Toronto, Ontario, Canada, M5G2N2 |
Principal Investigator: | Deepali Kumar, MD | University Health Network, Toronto |
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: | Deepali Kumar, Clinician-Investigator, University Health Network, Toronto |
ClinicalTrials.gov Identifier: | NCT04885907 |
Other Study ID Numbers: |
21-5324.0 |
First Posted: | May 13, 2021 Key Record Dates |
Last Update Posted: | August 2, 2022 |
Last Verified: | July 2022 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Product Manufactured in and Exported from the U.S.: | Yes |
solid organ transplant vaccine |
COVID-19 Respiratory Tract Infections Infections Pneumonia, Viral Pneumonia Virus Diseases Coronavirus Infections Coronaviridae Infections |
Nidovirales Infections RNA Virus Infections Lung Diseases Respiratory Tract Diseases Vaccines Immunologic Factors Physiological Effects of Drugs |