The Centers for Disease Control and Prevention (CDC) has announced they are investigating reports of heart issues in young patients who have received a Covid-19 vaccine.  According to the CDC, there have been “relatively few” cases of young people developing heart symptoms following their inoculations, but the CDC is requesting that “information about this potential adverse event” be provided to clinicians to “enhance early recognition and appropriate management of persons who develop myocarditis symptoms.” The few dozen cases so far have involved teenagers and young adults, mostly males, who have received either the Moderna or Pfizer-BioNTech vaccines.

The agency has not specified the exact ages of the patients reporting symptoms, and the CDC’s vaccine safety group has not determined whether the condition is directly related to the vaccinations, and said the cases have been “mild” thus far. Patients have reported their symptoms within four days of receiving a vaccine dose. Follow-up cases are currently ongoing.

In April, Israel’s Health Ministry also announced it was looking into a handful of cases of heart inflammation, possibly linked to the Pfizer vaccine. The cases reported had been from people aged 30 or below.