U.S. Centers for Disease Control and Prevention(CDC) advisory group said, some teenagers and young adults who received mRNA COVID-19 vaccines experienced heart muscle inflammation predominantly among adolescents and young adults.
The committee, hosted by the CDC, will hear a risk-benefit analysis as researchers explore whether the shots can cause myocarditis, as well as cases of inflammation of the heart lining, pericarditis.
The CDC said the cases typically occurred within four days after receiving the mRNA vaccines. It did not specify which vaccines. The United States has given emergency authorisation to two mRNA vaccines, from Moderna Inc and Pfizer/BioNTech.
Israel was the first country to identify a possible link.Israel’s Health Ministry in April said it was examining a small number of cases of heart inflammation in people who had received Pfizer’s vaccine, though it had not yet drawn any conclusions. Most of the cases in Israel were reported among people up to age 30.
Pfizer at the time said it had not observed a higher rate of the condition than would normally be the case in the general population and that a causal link to the vaccine had not been established.
CDC monitoring systems had not found more cases than would be expected in the population, but members of the committee on vaccinations felt that healthcare providers should be made aware of the reports of the “potential adverse event,” the committee said in the statement.