CDC and its partners are actively monitoring reports of myocarditis and pericarditis after COVID-19 vaccination. Active monitoring includes reviewing data and medical records and evaluating the relationship to COVID-19 vaccination.
Myocarditis is inflammation of the heart muscle, and pericarditis is inflammation of the outer lining of the heart. In both cases, the body’s immune system causes inflammation in response to an infection or some other trigger. Learn more about myocarditis and pericarditis.external icon Seek medical care if you or your child have symptoms of these conditions after COVID-19 vaccination. Myocarditis and pericarditis have rarely been reported, especially in adolescents and young adult males within several days after COVID-19 vaccination.
What You Need to Know
- Cases of myocarditis reported to the Vaccine Adverse Event Reporting System (VAERS)external icon have occurred:
- After mRNA COVID-19 vaccination (Pfizer-BioNTech or Moderna), especially in male adolescents and young adults
- More often after the second dose
- Usually within a week of vaccination
- Most patients with myocarditis or pericarditis who received care responded well to medicine and rest and felt better quickly.
- Patients can usually return to their normal daily activities after their symptoms improve. Those who have been diagnosed with myocarditis should consult with their cardiologist (heart doctor) about return to exercise or sports. More information will be shared as it becomes available.
Continued on Source: COVID-19 Vaccination