Yuwei Zhang, George Washington University (IMAGE) George Washington University Caption Lead Research Scientist Yuwei Zhang works under a hood in the Environmental and Occupational Health lab on GW's Foggy Bottom Campus. Credit The George Washington University 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.