Scientist Drew Weissman, who won the 2023 Nobel Prize in Medicine for his role in developing the mRNA technology, warned in a 2018 paper that not only did clinical trials of mRNA vaccines produce “more modest [results] in humans than was expected based on animal models,” but that the “side effects were not trivial.”

Potential Side Effects from COVID-19 mRNA Vaccine

A recent study published in Frontiers in Immunology has raised concerns about potential alterations to base functions of a person’s immune system by Pfizer’s mRNA COVID-19 vaccine.

A teenager receives a dose of the Pfizer-BioNtech COVID-19 vaccine at Clalit Health Services in Tel Aviv, Israel, on Jan. 23, 2021. (Jack Guez/AFP via Getty Images)

The researchers looked at children who had received COVID-19 vaccinations and found that there was “a general decrease in cytokine and chemokine responses” to bacteria, fungi, and non-COVID viruses. Cytokines and chemokines are proteins secreted by the cells of the immune system.

“Our findings suggest SARS-CoV-2 mRNA vaccination could alter the immune response to other pathogens, which cause both vaccine-preventable and non-vaccine-preventable diseases,” the researchers wrote.

“This is particularly relevant in children as they: have extensive exposure to microbes at daycare, school, and social occasions; are often encountering these microbes for the first time; and receive multiple vaccines as part of routine childhood vaccination schedules.”

A recent study from Japan investigated people who received a Pfizer or Moderna mRNA shot. They found that such people had higher levels of fluorodeoxyglucose F18 (FDG) in their heart, spleen, and liver compared to unvaccinated individuals.

FDG is a glucose analogue and marker of inflammation in the body. Higher FDG levels indicate heart inflammation, the authors wrote in the study.

Another study found that Moderna’s mRNA-1273 vaccine presented a higher risk of damage to myocardium, the middle muscular layer of the heart.

Getting a jab was associated with “elevation of markers of myocardial injury” in about one out of 35 individuals (2.8 percent), the study said. In a generally healthy population, this level would be around 1 percent, it stated.

The researchers followed the subjects who experienced adverse effects post vaccination for 30 days and found that half of them had unusually high levels of high-sensitivity cardiac troponin T, which is an indicator of subclinical heart damage.

Amid overwhelming evidence of mRNA vaccines leading to heart complications, some studies also suggest that the COVID-19 infection may be more dangerous than the vaccines.

An Aug. 2022 study published in the American Heart Association (AHA) looked at individuals above 13 years of age who had received at least one dose of mRNA COVID-19 vaccines manufactured by Pfizer and Moderna. The subjects were admitted to a hospital or died from myocarditis between December 1, 2020, and December 15, 2021.

“Overall, the risk of myocarditis is greater after SARS-CoV-2 infection than after COVID-19 vaccination and remains modest after sequential doses including a booster dose of BNT162b2 mRNA vaccine (Pfizer),” it said.

However, “the risk of myocarditis after vaccination is higher in younger men, particularly after a second dose of the mRNA-1273 vaccine (Moderna).”

Last month, Florida’s Surgeon General, Dr. Joseph Ladapo, advised people under 65 years of age not to take the new COVID-19 mRNA vaccines, and for those over 65 to discuss risks of the COVID-19 mRNA vaccine with their doctor to decide on their health approach during the pandemic.

“There’s essentially no evidence for it. There's been no clinical trial done in human beings showing that it benefits people, there's been no clinical trial showing that it is a safe product for people,” he said during a news conference.

“There are multiple studies now from around the world, Brazil, Australia, United States that show that over time these vaccines, these mRNA COVID-19 products actually increase your chances of contracting COVID-19.”