U.S. Marine Corps Sgt. Maj. Jason Davey, sergeant major of Marine Corps Air Station (MCAS) Yuma, receives the first dose of the COVID-19 vaccine aboard MCAS Yuma, Ariz., Feb. 5, 2021. Vaccines are being administered in phased approach, prioritizing healthcare workers and first responders, as well as mission critical and deploying personnel. The vaccine is voluntary and Marines are receiving it in order to keep the Corp mission ready. (U.S. Marine Corps photo by Cpl. Jason Monty) - U.S. Marine Corps Sgt. Maj. Jason Davey, sergeant major of Marine Corps Air Station (MCAS) Yuma, receives the first dose of the COVID-19 vaccine aboard MCAS Yuma, Ariz., Feb. 5, 2021.