Two new studies released this week have further suggested there is a link between mRNA COVID-19 vaccines and heart inflammation cases—coming after federal health officials added warnings to Moderna’s and Pfizer’s shots. A study from Duke University, released in JAMACardiology, looked at four cases of myocarditis, which refers to heart inflammation in the central layer of the heart wall, that occurred within five days of COVID-19 vaccination between Feb. 1 and April 30 of this year. “All 4 patients had received the second dose of a messenger RNA (mRNA) vaccine, presented with severe chest pain, had biomarker evidence of myocardial injury, were hospitalized, and had cardiac magnetic resonance imaging findings typical of myocarditis,” said researchers, concluding that there is a possibility of an association between the health condition and the shot. Federal health officials have said that the risks of developing heart inflammation are outweighed by the benefits of the …