From understanding the viral spillover risk of diseases like coronavirus to research on the health of great apes, Nelson Institute alumna Sarah H. Olson is at the forefront of some of today’s most pressing environmental health concerns. A graduate of the Nelson Institute Environment and Resources and the Population Health PhD program, Olson currently works as the associate director of epidemiology for the Wildlife Conservation Society (WCS) Health Program, but her path into One Health was not always clear.