Research Team (IMAGE) University of Washington Caption Researchers sampled monthly through the pandemic. Here, Elizabeth Andruszkiewicz Allan, Erin D’Agnese and Maya Garber-Yonts (l-r) sample Portage Creek near Stanwood in April 2021. Credit Elizabeth Andruszkiewicz Allan/University of Washington Usage Restrictions With credit License Original 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.