Pre-existing health conditions and severe COVID-19 outcomes: an umbrella review approach and meta-analysis of global evidence

by Marina Treskova-Schwarzbach, Laura Haas, Sarah Reda, Antonia Pilic, Anna Borodova, Kasra Karimi, Judith Koch, Teresa Nygren, Stefan Scholz, Viktoria Schönfeld, Sabine Vygen-Bonnet, Ole Wichmann, Thomas Harder
Published 2021-08-01