DoD launches online COVID-19 vaccination scheduling tool 3 hours ago James Folaron, a Red Cross volunteer, administers the Moderna COVID-19 vaccine to Katrina Farinas, a U.S. military spouse, at Kadena Air Base, Japan, April 8. (Airman 1st Class Anna Nolte/Air Force) If you’re searching for an appointment to get your COVID-19 vaccination through the military, check out this new online vaccine scheduling tool launched by the Defense Health Agency. The Defense Health Agency Appointing Portal — dubbed DAP— is accessible from outside the Defense Department network on any computer, tablet or smartphone. It’s used to book appointments for those eligible, at a participating military hospital, clinic, or vaccination site. You don’t need to be enrolled at a military hospital or clinic to book an appointment.