Army Spc. Ying Chen, a New York National Guardsman, prepares a dosage of the Pfizer-BioNTech COVID-19 vaccine at the Camp Smith Training Site Medical Readiness Clinic, N.Y., Dec. 18, 2020. The New York National Guard is administering 44,000 doses of the Pfizer vaccine to front line medical personnel at 16 locations around the world as part of a pilot program.