CI

At a glance

ClinicalIndex Comparison Record
Phase 2Completed· 81 enrolled
Drug / intervention
BNT162b2 vaccine (Pfizer/BioNTech) +1 morebiological
Likely dose
BNT162b2 vaccine (Pfizer/BioNTech) 30 microgramfrom record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT04969263
NCT04969263Phase 2Completed

Immunogenicity of a Third Dose of Either the Moderna COVID-19 Vaccine or Pfizer-BioNTech COVID-19 Vaccine in Kidney Transplant Recipients Who Failed to Respond After Two Previous Doses

National Institute of Allergy and Infectious Diseases (NIAID)·interventional·Posted Jul 20, 2021·Updated Jul 30, 2025

In Brief

A Phase 2 clinical trial evaluating BNT162b2 vaccine (Pfizer/BioNTech) and mRNA-1273 vaccine (Moderna) for Kidney Transplant Recipients. Completed, enrolled 81 participants across 1 site.

Detailed Summary

Antibodies are an important part of the body's defense against infection. Individuals who have no antibodies or very low antibody levels are considered less well protected from Coronavirus Disease 2019 (COVID-19) than those who have higher antibody levels. What level of antibodies is necessary for protection is currently unknown. Inadequate antibody response to Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) vaccination has been described among kidney transplant recipients. The aim of this study is to elicit an antibody response to vaccination against SARS-CoV-2 in kidney transplant recipients who have failed to respond to two doses of either the Moderna COVID-19 vaccine or Pfizer-BioNTech Coronavirus Disease 2019 (COVID-19) vaccine.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesUnited States
CollaboratorsPPD Development, LP

Timeline

Phase 2CompletedFinished
20222023202420252026
First PostedJul 20, 2021
Enrollment StartAug 10, 2021
Primary CompletionNov 10, 2022
Study CompletionMar 10, 2023
TodayJul 2, 2026
Enrollment to primary: 1.3 yearsPosted 5.0 years ago

Interventions

BNT162b2 vaccine (Pfizer/BioNTech)biological

30 microgram dose

mRNA-1273 vaccine (Moderna)biological

100 microgram dose