Misook Choe, a laboratory manager with the Emerging Infectious Disease branch at the Walter Reed Army Institute of Research in Silver Spring, Md., runs a test during research into a solution for the new coronavirus, COVID-19, March 3, 2020. The Emerging Infectious Diseases branch, established in 2018, has the explicit mission to survey, anticipate and counter the mounting threat of emerging infectious diseases of key importance to U.S. forces in the homeland and abroad.