Vaccine Prep Five military medical treatment facilities are participating in a Phase 3 clinical trial of a COVID-19 vaccine in development with AstraZeneca in Falls Church, Va., Nov. 17, 2020. SHARE: Download: Full Size (0.14 MB) Tags: development, coronavirus, warp speed, ows Credit: Air Force Staff Sgt. Joshua Garcia VIRIN: 201117-F-FT687-003A.JPG Photo Gallery