CI

At a glance

ClinicalIndex Comparison Record
Phase 4Completed· 137 enrolled
Drug / intervention
Pfizer-BioNTech mRNA COVID-19 vaccine +1 morebiological
Likely dose
Not stated in 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/NCT05212610
NCT05212610Phase 4Completed

Assessing Safety of COVID-19 mRNA Vaccine Administration in the Setting of a Previous Adverse Reaction

University of Michigan·interventional·Posted Jan 28, 2022·Updated Mar 27, 2026

In Brief

A Phase 4 clinical trial evaluating Pfizer-BioNTech mRNA COVID-19 vaccine and Moderna mRNA COVID-19 vaccine for COVID-19 and Corona Virus Infection. Completed, enrolled 137 participants across 1 site.

Detailed Summary

This study will evaluate the safety of administering an additional dose of an mRNA COVID-19 vaccine or mRNA bivalent COVID-19 booster vaccine to individuals who have had adverse reactions to a previous dose or administering an initial dose of an mRNA COVID-19 vaccine to individuals with a personal history of allergic reaction. In addition, this study will evaluate the safety of administering an initial or additional dose or bivalent booster of an mRNA COVID-19 vaccine to individuals experiencing an adverse reaction to a natural COVID-19 infection ("long COVID"). Eligible participants enrolled in this trial will receive an initial or additional dose of either the Pfizer-BioNTech COVID-19 bivalent vaccine or the Moderna COVID-19 bivalent vaccine. Participants will also be required to have 1-2 in person visits along with phone call follow up visits. We hypothesize that individuals who have had adverse reactions to a previous dose of an mRNA COVID-19 vaccine will tolerate an additional dose of the primary mRNA vaccine or bivalent booster, as indicated, and those with a personal history of allergic reaction will tolerate an initial dose of an mRNA COVID-19 vaccine. We also hypothesize that those individuals experiencing an adverse reaction will tolerate an initial or additional dose of a primary mRNA COVID-19 bivalent vaccine, as indicated. The study hypothesizes that individuals that have had adverse reactions to a dose of an mRNA COVID-19 vaccine will tolerate an additional dose and those with a personal history of allergic reaction will tolerate vaccination with an mRNA COVID-19 vaccine.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesUnited States

Timeline

Phase 4CompletedFinished
20222023202420252026
First PostedJan 28, 2022
Enrollment StartMar 21, 2022
Primary CompletionMar 7, 2025
TodayJul 2, 2026
Enrollment to primary: 3.0 yearsPosted 4.4 years ago

Interventions

Pfizer-BioNTech mRNA COVID-19 vaccinebiological

Participants will receive an initial or additional dose of a highly protective COVID-19 mRNA vaccine for the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus in an environment where the investigators and staff are experienced in the care of patients with allergic reactions.

Moderna mRNA COVID-19 vaccinebiological

Participants will receive an initial or additional dose of a highly protective COVID-19 mRNA vaccine for the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus in an environment where the investigators and staff are experienced in the care of patients with allergic reactions.