Senior author (IMAGE) University of Massachusetts Amherst Caption Vector-borne disease expert Stephen Rich is a professor of microbiology at UMass Amherst and executive director of the UMass Amherst-based New England Center of Excellence in Vector-Borne Diseases. Credit Umass Amherst Usage Restrictions None 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.