U.S. Marine Corps Lt. Col. Scott. F. Welch, the 12th

U.S. Marine Corps Lt. Col. Scott. F. Welch, the 12th Marine Corps District District Recruiting Operations Officer, receives his first COVID-19 vaccine injection at Marine Corps Recruit Depot San Diego, Calif., Jan. 25, 2021. COVID-19 vaccines are being administered in a phased approach, prioritizing healthcare workers and first responders, as well as mission critical and deploying personnel. Vaccination distribution and prioritization within the Department of Defense, and the Marine Corps, will be consistent with the data-driven Center for Disease and Control guidance for national prioritization. (U.S. Marine Corps photo by Sgt. Christian Cachola)