With reports of myocarditis surfacing after a few people received COVID-19 vaccines, the Centers for Disease Control and Prevention Advisory Committee on Immunization Practices discussed the potential implications of both Pfizer and Moderna’s shots and found that while risks with both are much smaller than the benefits they provide, one of the two is more likely to produce the negative side effect.

It was found that Moderna’s two-dose COVID-19 vaccine is associated with a higher risk of heart inflammation than Pfizer’s, CNBC reports.

Young men, including teenagers, have the largest risk of developing myocarditis after receiving the second dose of either mRNA vaccine, with a higher risk of cases amongst those getting the Moderna shot. After a couple of days following vaccination, symptoms could include heart palpitations, shortness of breath, and chest pains.

The national public health agency stressed, however, that the benefits for both mRNA vaccines outweigh the risks. Furthermore, a CDC survey deduced that most people who suffered from myocarditis following vaccination seamlessly regained their health.

Amidst discussion that the COVID-19 vaccines can affect fertility, a recent study published in the American Journal of Epidemiology found that it does not hinder the ability to conceive in men or women. However, there was evidence to suggest that the virus itself can temporarily weaken fertility in men.