New study tracks heart inflammation in teens after pfizer vaccine
NCT ID NCT05295290
First seen Nov 01, 2025 · Last updated Jun 23, 2026 · Updated 33 times
Summary
This study follows 319 people under 21 who developed heart inflammation (myocarditis or pericarditis) within 21 days of receiving the Comirnaty (Pfizer) COVID-19 vaccine. Researchers will monitor their heart function with imaging tests for up to 5 years to see if there are lasting effects. The goal is to better understand the risks and recovery from this rare side effect.
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This is a summary of
the original study
.
Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Contacts and locations
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Locations
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Boston Children's Hospital
Boston, Massachusetts, 02115, United States
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Children's Healthcare of Atlanta - Arthur M. Blank Hospital
Atlanta, Georgia, 30329, United States
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Children's Hospital
New Orleans, Louisiana, 70118, United States
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Children's Hospital of Michigan
Detroit, Michigan, 48201, United States
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Childrens Hospital Los Angeles
Los Angeles, California, 90027, United States
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Childrens Mercy Kansas City
Kansas City, Missouri, 64108, United States
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Childrens National Hospital
Washington D.C., District of Columbia, 20010, United States
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Cincinnati Children's Hospital Medical Center
Cincinnati, Ohio, 45229, United States
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Columbia University Medical Center
New York, New York, 10032, United States
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Connecticut Children's Medical Center
Hartford, Connecticut, 06106, United States
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Indiana University School of Medicine
Indianapolis, Indiana, 46202, United States
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MUSC Summey Medical Pavilion
North Charleston, South Carolina, 20406, United States
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Memorial Healthcare System
Hollywood, Florida, 33021, United States
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Northwell Health-Cohen Children's Medical Center
New Hyde Park, New York, 11042, United States
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Riley Hospital for Children at IU Health
Indianapolis, Indiana, 46202, United States
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The Children's Hospital of Philadelphia
Philadelphia, Pennsylvania, 19104, United States
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University of Michigan Health Center
Ann Arbor, Michigan, 48109, United States
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Valley Children's Hospital
Madera, California, 93636, United States
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
What this could lead to
If successful, this study could clarify the long-term heart health risks after COVID-19 vaccination in young people, helping guide future vaccine safety recommendations.
What could go wrong
This is an observational study, not a treatment trial, so it won't offer new therapies. The findings may be limited by the small number of participants (319) and the lack of a comparison group.
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.