COVID Vaccine Labels To Warn of Rare Heart Risk
By I. Edwards HealthDay Reporter
FRIDAY, June 27, 2025 — The U.S. Food and Drug Administration (FDA) has added new warnings to the Pfizer and Moderna COVID-19 vaccines about a rare heart condition that mostly affects young men.
The update expands earlier warnings about myocarditis, a type of heart inflammation, The Associated Press reported.
The condition is still very rare and usually mild, experts say.
The new label notes there were 8 cases of myocarditis for every 1 million people between 6 months and 64 years of age who received the 2023–2024 COVID-19 vaccine.
It also highlights that the highest risk group is males between ages 12 and 24. Previously, the label focused mostly on 12- to 17-year-olds.
The condition was first linked to COVID-19 vaccines in 2021. Doctors were already advised to watch for it, but the FDA asked Pfizer and Moderna in April to provide more detail and expand the age range included in the warning, The AP said.
Myocarditis is swelling in the heart muscle. It can cause chest pain, fatigue, or shortness of breath, according to the Mayo Clinic. In most cases, it gets better quickly with rest or medication.
Health experts stress that the condition is less severe than myocarditis caused by COVID-19 itself.
Some public health leaders worry the new warning is the wrong approach.
“They are right to suggest that we need to consider myocarditis risks associated with the vaccine, but what they propose is exactly the wrong solution,” Robert Morris, a public health expert at the University of Washington, told The AP.
“We should be investigating who is prone to myocarditis to see if we can predict and mitigate that risk,” he said.
The label update comes as a new U.S. Centers for Disease Control and Prevention (CDC) advisory panel, appointed by U.S. Health Secretary Robert F. Kennedy Jr., met to discuss vaccine guidance.
Kennedy recently removed all 17 previous members of the committee, replacing them with new members — some of whom have shared anti-vaccine views.
FDA Commissioner Dr. Marty Makary, a Kennedy appointee, has also restricted COVID-19 shots to seniors and high-risk individuals.
He and others have questioned the need for annual shots or seasonal tweaks to the vaccine, The Post reported.
Sources
- The Associated Press, June 25, 2025
Disclaimer: Statistical data in medical articles provide general trends and do not pertain to individuals. Individual factors can vary greatly. Always seek personalized medical advice for individual healthcare decisions.

© 2025 HealthDay. All rights reserved.
Posted June 2025
Further Support and Information on COVID-19
Read this next
U.S. Stops Funding for Gavi Global Vaccine Program, Sparking Backlash
FRIDAY, June 27, 2025 — The United States will stop sending money to Gavi, a global group that helps vaccinate children in low-income countries, U.S. Health and Human...
RFK Jr.-Appointed Vaccine Panel Removes Flu Shot Ingredient
FRIDAY, June 27, 2025 — A U.S. vaccine advisory panel voted Thursday to stop recommending flu shots that contain thimerosal, a move that experts say may reduce access to...
High-Fiber Diet Reduces Risk of Hardened Arteries
FRIDAY, June 27, 2025 — Noshing on veggies, grains, beans and other high-fiber foods can help your heart as well as your gut health, a new study says. People with low-fiber...
More news resources
- FDA Medwatch Drug Alerts
- Daily MedNews
- News for Health Professionals
- New Drug Approvals
- New Drug Applications
- Drug Shortages
- Clinical Trial Results
- Generic Drug Approvals
Subscribe to our newsletter
Whatever your topic of interest, subscribe to our newsletters to get the best of Drugs.com in your inbox.