U.S. Air Force Col. (Dr.) Ryan Mihata, 86th Medical Group commander, receives his first dose of the COVID-19 vaccine at Ramstein Air Base, Germany, Jan. 4, 2021. Initial quantities of the vaccine are limited to first responders and medical personnel. Vaccines will be distributed on a rolling delivery basis as more become available. (U.S. Air Force photo by Senior Airman Jennifer Gonzales)