Survey Says Half of Americans Think COVID Vaccine May Cause Heart Issues

A recent survey is stirring up chatter about the COVID-19 vaccines, with a good chunk of Americans saying they’re worried the shots might be linked to heart problems.

Dr. Robert Malone, a vaccine skeptic and mRNA tech contributor, highlighted the poll on his Substack, pointing to growing public concern after FDA warnings about possible heart inflammation risks.

It’s a topic that’s been simmering for years, and with related studies digging into the virus’s long-term effects, people are paying attention.

Dr. Robert Malone is reporting that Rasmussen Reports national telephone and online survey finds that 51% of American Adults believe it’s likely that the COVID-19 vaccine has caused inflammation in the hearts of many vaccinated Americans

A Rasmussen Reports national telephone and online survey, cited by Dr. Malone in his May 2025 Substack post, found that 51% of American adults believe it’s likely the COVID-19 vaccine has caused heart inflammation in many vaccinated people.

“The latest Rasmussen Reports national telephone and online survey finds that 51% of American Adults believe it’s likely that the COVID-19 vaccine has caused inflammation in the hearts of many vaccinated Americans, including 29% who think it is Very Likely,” the survey stated.

Meanwhile, 28% don’t think it’s likely, and 21% aren’t sure. This comes after FDA warnings about potential heart risks, which Malone says have fueled public suspicion.

A 2022 study found that mRNA COVID-19 vaccines, like Pfizer and Moderna, were linked to an uptick in myocarditis cases

Malone, who’s been vocal about vaccine safety concerns, didn’t hold back in his post.

He tied the survey to broader health questions, noting that he’s been asked:

“What can we do to alleviate damage from the jab and long COVID?”

He’s previously shared advice on repairing heart damage, pointing to a 2023 post titled “Dr. Robert Malone: How To Repair Your Heart From Vaccine Damage,” where he explored possible solutions, though specific remedies weren’t detailed in the latest piece.

His focus here is more on the public’s growing distrust, spotlighting the Rasmussen poll as evidence of widespread unease.

Other research adds layers to the conversation. A study from the Clinical Practice Research Datalink (CPRD), cited in the web results, looked at cardiovascular risks in COVID-19 patients, noting that “patients with COVID-19 commonly experience conditions affecting the heart and blood vessels,” such as heart failure, per cprd.com.

The FDA confirmed in June 2021 that mRNA COVID-19 vaccines, like Pfizer and Moderna, carry a small risk of myocarditis, adding a warning label after data showed a higher-than-expected rate of cases, especially in young men—about 1 in 20,000 after the second dose.

It also found cases of heart issues in patients with no prior history, suggesting the virus itself might directly damage the heart.

On the flip side, a 2025 study from the University of Bristol, reported by Newswise, explored how the pandemic delayed congenital heart disease surgeries in kids, with Professor Massimo Caputo saying, “We also need to understand the impact of COVID-19 infection on children with CHD,” highlighting the virus’s broader ripple effects.

The Rasmussen survey, as Malone presents it, taps into a real undercurrent of worry—51% isn’t a small number. With studies still unpacking the virus’s long-term impact, and the FDA’s warnings lingering in people’s minds, this debate isn’t going away anytime soon. As of today, it’s clear folks are still wrestling with what the vaccines—and the virus—mean for their health.

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