Few Side Effects Conclusively Linked to COVID-19 Vaccines: National Academies

Organization claims just a handful of side effects definitely or likely are caused by the vaccines.

COVID-19 vaccines in a file photograph. Joseph Prezioso/AFP via Getty Images

The Pfizer-BioNTech and Moderna COVID-19 vaccines cause heart inflammation, a new report from a National Academies of Sciences, Engineering, and Medicine (NASEM) committee says.

But the organization’s report also says that the current body of evidence does not support or establish a causal link between the messenger RNA vaccines and virtually any other side effects, drawing criticism from some outside experts.