Vaccine Briefing Thomas McCaffery, the assistant secretary of defense for health affairs, briefs reporters at the Pentagon on the department’s phased, standardized and coordinated strategy for distributing and administrating COVID-19 vaccines, Dec. 9, 2020. SHARE IMAGE: Download Image: Full Size (0.72 MB) Photo By: Air Force Staff Sgt. Brittany A. Chase VIRIN: 201209-D-BM568-0025A.JPG Photo Gallery