COVID-19 (IMAGE) La Jolla Institute for Immunology Caption People with severe COVID-19 manifestations may be left with more of the protective "memory" T cells needed to fight reinfection. Credit La Jolla Institute for Immunology Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.