Blood Collection A Marine participating in the COVID-19 Health Action Response for Marines (CHARM) study covers a needle hole after getting his blood sample collected on Camp Johnson, N.C., March 3, 2021. CHARM 2.0 is a volunteer progression-based assessment to monitor possible health related issues as a result of COVID-19 recovery. SHARE: Download: Full Size (1.61 MB) Credit: Marine Corps Sgt. Jesus Sepulveda Torres VIRIN: 210303-M-UG177-0006C.JPG Photo Gallery