Gallatin County prepares for Phase 1B of vaccine distribution, changes to prioritization Adjustments being made to vaccination plan and last updated 2021-01-10 17:21:33-05 BOZEMAN, MT â Phase 1A of vaccine distribution continued in Gallatin County last week. Frontline healthcare workers and others eligible for the vaccine received their first doses over three days. But with a changing administration, the next phase is seeing a change in prioritizing the vaccine. Friday morning marked another day at the Gallatin County Fairgroundâs Vaccination Center for those to come to a POD, or âPoint of Distribution,â to receive their Phase 1-A COVID-19 vaccination.