Nearly 800 Reports of Heart Inflammation After COVID-19 Vaccination in US

Federal authorities have received over 800 reports of heart inflammation in people who received a COVID-19 vaccine, a health official said Thursday.

The reports of myocarditis or pericarditis were submitted to the Vaccine Adverse Event Reporting System, a passive reporting system run jointly by the Centers for Disease Control and Prevention (CDC) and the Food and Drug Administration, through May 31.

The bulk of the reports described heart inflammation appearing after the second of two doses of either the Pfizer of Moderna vaccines, both of which utilize messenger RNA technology.

Authorities stress that anybody can submit reports through the reporting system but authorities have already verified that 226 of the reports meet the CDC’s working case definition, Dr. Tom Shimabukuro, a deputy director at the agency, said during a presentation of the data. Follow up and review are in progress for the rest.

Of the 285 case reports for which the disposition was known at the time of the review, 270 patients had been discharged and 15 were still hospitalized, officials said. Myocarditis typically requires hospital care. No deaths were reported.

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