An unclear tweet from New York City health officials was meant to caution residents that the latest omicron subvariant, XBB.1.5, might be more likely than previous variants to infect vaccinated or previously infected people. Social media posts misinterpreted the tweet to mean that vaccinated people were at higher risk than unvaccinated people.
Government health agencies disclosed a potential safety concern for strokes in those 65 and older with one of the COVID-19 vaccines, but the agencies haven’t found any causal relationship and the concern was flagged by just one of several monitoring systems. Anti-vaccine campaigners, however, have wrongly claimed the agencies have found a link between the boosters and strokes.
Since his diagnosis in 1991, NBA player Magic Johnson has repeatedly said he contracted HIV through sexual transmission. But a viral social media post by a spreader of vaccine misinformation falsely claims that Johnson was exposed to the virus from a hepatitis B vaccine.
The COVID-19 vaccines were tested in large, randomized controlled trials before the Food and Drug Administration authorized them for emergency use. But a popular YouTube video spins a conspiracy theory that distorts legal codes to falsely claim otherwise.
Sports medicine experts say there has been no increase in sudden death or cardiac injury among U.S. athletes since the COVID-19 vaccines became available. Yet anti-vaccine campaigners, comparing unreliable numbers to an unrelated study, have again spread a false narrative about vaccine safety since NFL player Damar Hamlin suffered cardiac arrest.
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.
Several European countries have reported an early spike of group A strep infections, mostly among children, including cases of rare but deadly bacterial infections. There is no evidence the increase is being caused by nasal spray flu vaccines, as social media posts baselessly suggest. Flu vaccination may even indirectly prevent strep A.
A vaccine safety surveillance study from the Food and Drug Administration has been misrepresented online. The paper did not establish a link between the Pfizer/BioNTech COVID-19 vaccine and blood clots, as some have claimed — and to date, other, more robust research has not identified such associations.
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.
To date, the benefits of COVID-19 mRNA vaccination outweigh the risks, which include a rare but increased risk of myocarditis, or heart inflammation. Social media posts, however, are citing a German autopsy study to misleadingly suggest otherwise.