Regulator Didn’t Tell Public About Post COVID-19 Vaccination Myocarditis for Four Months

The MHRA said it needed to assess data from multiple sources before adding warnings to COVID shots.

A file photo shows a worker preparing a COVID-19 vaccine. Liam McBurney/PA Media

The UK Medicines and Healthcare Products Regulatory Agency (MHRA) detected a signal for post-vaccination myocarditis and pericarditis four months before telling the public, emails show.

According to emails, the MHRA detected a safety signal for heart inflammation after COVID-19 vaccination in early 2021, but did not tell the public about the issue for nearly four months until June 25, 2021, when it added warnings to the labels for the Pfizer and Moderna shots.