This could be of concern:
The Centers for Disease Control and Prevention’s Advisory Committee on Immunization Practices announced Thursday it will be holding an “emergency meeting” next week to discuss the COVID-19 vaccines in adolescents and reports of myocarditis, or inflammation of the heart, after mRNA vaccination.
The CDC said 226 cases reported to the Vaccine Adverse Event Reporting System in those 30 years old and under, out of 475, “meet CDC working case definition” of myocarditis/pericarditis. Reporting in the VAERS system “generally, cannot determine cause and effect,” the CDC noted.
Most recovered, but 15 are still in the hospital and three are in the intensive care unit, though two of those patients were described as having “significant comorbidities.”