Collecting Blood A sailor collects blood from a Marine participating in the COVID-19 Health Action Response for Marines study at Naval Hospital Camp Pendleton, Calif., May 24, 2021. The study aims to understand the long-term health impact of COVID-19 infection by following participants over a period of time. SHARE: Download: Full Size (3.17 MB) Tags: Navy, Marine Corps, Coronavirus, covid19vaccine Credit: Regena Kowitz, Navy VIRIN: 210525-N-UJ980-0015A.JPG Photo Gallery