Test Samples Letzibeth Mendez-Rivera, a lab manager with The Emerging Infectious Disease Branch at the Walter Reed Army Institute of Research, outside of Washington, D.C., studies coronavirus protein samples, June 1, 2020. The EIDB is part of WRAIR's effort to produce a COVID-19 vaccine candidate. SHARE: Download: Full Size (0.2 MB) Tags: Coronavirus Credit: Mike Walters, U.S. Army VIRIN: 200701-A-PR201-2001.JPG Photo Gallery