Preparing Samples Amanda Cherry, a research assistant, prepares diagnostic samples for polymerase chain reaction testing in the Naval Infectious Diseases Diagnostic Laboratory in Silver Spring, Md., Jan. 26, 2022. NMRC’s NIDDL is the Navy’s Clinical Reference Laboratory, capable of testing for non-routine infectious diseases affecting warfighters. SHARE: Download: Full Size (3.03 MB) Tags: Coronavirus Credit: Michael Wilson VIRIN: 220126-N-GC612-1140.JPG Photo Gallery