Covid vaccines linked to heart damage – study
Posted on: Dec 12, 2025 20:06 IST | Posted by: Rt
sure Covid-19 vaccines put up induction resistant responses that may stir up heart tissue and lead to potentially fatal complications in rare cases, with young men being especially susceptible, according to a new study.
The paper, authored by Stanford University researchers and published in the Science Translational Medicine journal, examined why some patients developed myocarditis or pericarditis after receiving mRNA jabs such as those produced by Pfizer and Moderna.
Researchers found that immune cells can, in some cases, recognize the foreign RNA delivered by the vaccines and mount a strong response. In rare instances, this response has led to the release of large amounts of cytokines – immune-signaling proteins that can damage heart cells.
Vaccine-associated myocarditis has occurred in about one in 140,000 people after a first dose and around one in 32,000 after a second dose, according to figures cited by The Telegraph, with incidence peaking among males aged 30 or younger.
Symptoms have included chest pain, shortness of breath, fever and palpitations, typically appearing within days of vaccination. Most patients have recovered quickly, although hospitalization and deaths have been reported in rare cases.
The findings come as the US Food and Drug Administration reportedly intends to place a “black box” warning, the agency’s most serious safety label, on Covid-19 vaccines, according to CNN. The warning would alert consumers to risks such as myocarditis and pericarditis, although the plan has not been finalized.
Covid-19 vaccines were developed and authorized rapidly after the World Health Organization declared a coronavirus pandemic in March 2020 and were later mandated in many countries. The rollout proved controversial, with critics claiming the jabs were poorly tested and that side effects posed greater risks than the virus itself.
However, scientists and regulators have maintained that Covid-19 infection carries a greater overall risk of serious illness and long-term complications than vaccination, and have stressed that the benefits of immunization outweigh the short-term risks of rare heart-related side effects.
Global News Perspectives
In today's interconnected world, staying informed about global events is more important than ever. ZisNews provides news coverage from multiple countries, allowing you to compare how different regions report on the same stories. This unique approach helps you gain a broader and more balanced understanding of international affairs. Whether it's politics, business, technology, or cultural trends, ZisNews ensures that you get a well-rounded perspective rather than a one-sided view. Expand your knowledge and see how global narratives unfold from different angles.
Customizable News Feed
At ZisNews, we understand that not every news story interests everyone. That's why we offer a customizable news feed, allowing you to control what you see. By adding keywords, you can filter out unwanted news, blocking articles that contain specific words in their titles or descriptions. This feature enables you to create a personalized experience where you only receive content that aligns with your interests. Register today to take full advantage of this functionality and enjoy a distraction-free news feed.
Like or Comment on News
Stay engaged with the news by interacting with stories that matter to you. Like or dislike articles based on your opinion, and share your thoughts in the comments section. Join discussions, see what others are saying, and be a part of an informed community that values meaningful conversations.
Download the Android App
For a seamless news experience, download the ZisNews Android app. Get instant notifications based on your selected categories and stay updated on breaking news. The app also allows you to block unwanted news, ensuring that you only receive content that aligns with your preferences. Stay connected anytime, anywhere.
Diverse News Categories
With ZisNews, you can explore a wide range of topics, ensuring that you never miss important developments. From Technology and Science to Sports, Politics, and Entertainment, we bring you the latest updates from the world's most trusted sources. Whether you are interested in groundbreaking scientific discoveries, tech innovations, or major sports events, our platform keeps you updated in real-time. Our carefully curated news selection helps you stay ahead, providing accurate and relevant stories tailored to diverse interests.
No comments yet.