FIRST LOOK: FEMA takes us inside mass vaccination site in Tampa ABC Action News got a behind-the-scenes look at the team of health care workers and members of the Department of Defense vaccinating hundreds of people a day at the federally supported site. and last updated 2021-03-04 23:17:40-05 TAMPA, Fla. â ABC Action News got a behind-the-scenes look at the team of health care workers and members of the Department of Defense vaccinating hundreds of people a day at the federally supported site. Four tents make up FEMA's mass vaccination site, including a makeshift registration room, vaccination area and waiting area to ensure people who received the shot do not experience any immediate adverse reactions.