COVID-19 Vaccines and Myocarditis: What Parents Need to Know About the Potential Link msnNOWOver 300 cases of heart issue after Covid vaccination reported in young people, CDC says NBC NewsVaccine fears: Concerns about adverse events and long-term effects of COVD-19 vaccines Chattanooga Times Free PressThese communities remain at high risk for dangerous Covid-19 variants rapidly increasing in US, expert warns CNN Pa.