Peak infection day in Washington, D.C. (IMAGE) University of Washington Caption This map shows the peak infection day range for census tracts in Washington, D.C. Credit Thomas et al., 2020, PNAS 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.