First wave of COVID-19 increased risk of heart attack, stroke up to three years later National Institutes of Health (NIH) (.gov)Severe COVID-19 infection increases heart attack and stroke risk as much as having a history of heart disease, study finds University of Southern CaliforniaCOVID may increase risk of heart attack, death years after infection: study WGN TV ChicagoCOVID-19 may increase heart attack and stroke risk for years American Heart Association NewsCOVID-19 may increase risk of death years after infection: Study The Hill