Laboratory abnormalities in the pre-COVID-19 period were CPK elevation (eight cases), related to intense sports activity in the previous days and blood glucose elevation (one case) in a patient with diabetic ketoacidosis; laboratory abnormalities in the COVID-19 period were CPK elevation (four cases) related to intense sports activity in the previous days and troponin elevation (one case) related to myocarditis. Here, PIK3C2A is linked to myocarditis.