A preprint on a Yale-based study described chronic symptoms self-reported after COVID-19 vaccination by 241 members of an online group. The paper, which has not been peer-reviewed, did not show how common these symptoms are in the general population, nor whether vaccinations caused them — limitations popular online posts did not make clear.
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.”
A Pfizer document recently released by the Food and Drug Administration describes adverse events reported following vaccination and attests to the continued safety of the company’s COVID-19 vaccine. A popular video and other online posts, however, incorrectly imply that the vaccine caused the events.