ICU Doc (IMAGE) Washington University School of Medicine Caption Clare Ridley, MD, an assistant professor of anesthesiology at Washington University School of Medicine in St. Louis, works in the intensive care unit at Barnes-Jewish Hospital during the COVID-19 pandemic. Researchers at the university are helming a global study of an estimated 30,000 health-care workers to establish whether the antimalaria drug chloroquine might prevent or reduce the severity of COVID-19 infections in such workers. Credit Erin Jones/Barnes-Jewish Hospital 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.