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A Project of The Annenberg Public Policy Center

Study Largely Confirms Known, Rare COVID-19 Vaccine Side Effects

Study Largely Confirms Known, Rare COVID-19 Vaccine Side Effects

An international study of around 99 million people confirmed known serious side effects of COVID-19 vaccination. It also identified a possible relationship between the first dose of the Moderna vaccine and a small risk of a neurological condition. Social media posts about the study left out information on the vaccines’ benefits and the rarity of the side effects.

Video Falsely Claims 850 People Died of Myocarditis in Mexico

Video Falsely Claims 850 People Died of Myocarditis in Mexico

Cases of myocarditis have been reported following mRNA COVID-19 vaccination, but they are rare and usually mild. Yet, a viral video distorts news reports to falsely claim 850 people died in Monterrey, Mexico, in June due to myocarditis. The figure comes from a false report of heat-related deaths.

Posts Exaggerate Significance of Swiss Study on Heart Risk and COVID-19 Vaccination

Posts Exaggerate Significance of Swiss Study on Heart Risk and COVID-19 Vaccination

A Swiss study found that after a COVID-19 booster, less than 3% of people briefly had a slightly elevated blood level of a protein that can be a marker of heart injury. No one in the study had any serious heart damage, and other experts say the findings are unlikely to be clinically significant. Viral posts, however, are spinning the results to falsely claim that the study shows the vaccine’s risks are “off the scale.”

NFL Player Damar Hamlin’s Cardiac Arrest Triggers Unfounded Social Media Claims

NFL Player Damar Hamlin’s Cardiac Arrest Triggers Unfounded Social Media Claims

Buffalo Bills player Damar Hamlin collapsed on the field and suffered a cardiac arrest moments after taking a hit to his chest during a tackle. While it’s not yet known why his heart stopped, some experts say his condition is most likely due to a heart rhythm problem as a result of that impact. Still, people on social media have baselessly speculated that it was caused by a COVID-19 vaccine.

DeSantis’ Dubious COVID-19 Vaccine Claims

DeSantis’ Dubious COVID-19 Vaccine Claims

While announcing a request for a grand jury probe into “crimes and wrongdoing” related to the COVID-19 vaccines, Florida Gov. Ron DeSantis and his panel of contrarian experts repeatedly suggested the shots were too risky. But such claims are unsupported and based on flawed analyses.

Florida’s COVID-19 Vaccination Analysis Is Flawed, Experts Say

Florida’s COVID-19 Vaccination Analysis Is Flawed, Experts Say

The state of Florida recently announced that it was no longer recommending that younger males receive mRNA COVID-19 vaccines, based on an unpublished analysis that purportedly found an increased risk of cardiac-related death following vaccination. But experts who specialize in the unique method used in the analysis say it was not properly done — and even if it had been, the findings would not mean that individuals should not get vaccinated.

Posts Distort Questionable Study on COVID-19 Vaccination and EMS Calls

Posts Distort Questionable Study on COVID-19 Vaccination and EMS Calls

Studies have found that COVID-19 increases the risk for heart complications, and that the benefits of COVID-19 vaccination outweigh the risks for males and females in all age groups. Social media posts, however, have misinterpreted and publicized a criticized study that claims to have identified a correlation between emergency calls for cardiac events and the vaccination rate in Israel.

Benefits of COVID-19 Vaccination Outweigh the Rare Risk of Myocarditis, Even in Young Males

Benefits of COVID-19 Vaccination Outweigh the Rare Risk of Myocarditis, Even in Young Males

Rare cases of myocarditis have been reported following the mRNA COVID-19 vaccines, particularly among young males after a second dose. Most cases resolve quickly without the need for advanced therapies, although research on any potential long-term effects is ongoing. Nonetheless, the benefits of vaccination outweigh the risks in all populations, even in young males.