Sanz and Galou Osette (IMAGE) Washington University School of Medicine Caption Crickette Sanz, PhD (right), an associate professor of biological anthropology in Arts & Sciences at Washington University, and research assistant Aimé Galou Ossette compare notes as they track apes in the Republic of Congo. Researchers wear masks to avoid exchange of potentially dangerous microbes between people and wild apes. Credit GOUALOUGO TRIANGLE APE PROJECT Usage Restrictions This image is to be used in accordance with the mission, policies and guidelines of Washington University in St. Louis. Visit https://wustl.edu/about/compliance-policies/media-policies/photo-use/ for more information. 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.