The U.S. Centers for Disease Control and Prevention (CDC) said it is investigating reports of heart inflammation in teenagers and young adults who have received the CCP (Chinese Communist Party) virus vaccine.
Noting that there have been “relatively few” reports of “mild” cases of myocarditis, the agency said that its COVID-19 Vaccine Safety Technical Work Group should investigate the matter and it should be communicated to vaccine recipients.
The agency said that vaccines using the mRNA technology—from pharmaceutical companies Pfizer and Moderna—appear to be causing the issue. Vaccines using mRNA, which are relatively uncommon, use messenger ribonucleic acid (RNA) to create a protein that prompts an immune response within an individual, while Johnson & Johnson’s vaccine instead uses an adenovirus that was rendered unable to replicate.
The reports of myocarditis have been mostly in adolescents and young adults—and are more likely occur in males rather than females. The symptoms also show up after the second dose about four days after vaccination, said the CDC’s Advisory Committee on Immunization Practices in a statement dated May 17.