After a hurried secret meeting with its advisory board on vaccine safety, the FDA reluctantly release a warning asking patients experiencing these symptoms to seek help immediately.The latest study, published in JAMA's Cardiology Journal on Tuesday, showed that 23 male soldiers (including 22 who were deemed "previously health") between the ages of 20 and 51 presented "acute onset of marked chest pain" within four days of receiving their second dose. Patients who sought care for chest pain in the military health-care system following COVID-19 vaccination and were subsequently diagnosed with clinical myocarditis were included in the case study.