AUTHOR=Sauer Karsten , Harris Tim TITLE=An Effective COVID-19 Vaccine Needs to Engage T Cells JOURNAL=Frontiers in Immunology VOLUME=11 YEAR=2020 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2020.581807 DOI=10.3389/fimmu.2020.581807 ISSN=1664-3224