AUGUSTA, Maine — Gov. Janet Mills received her first dose of the coronavirus vaccine, her office announced Friday.The 73-year-old governor would be eligible to receive the vaccine under Phase 1A of Maine’s vaccination plan as a worker critical to the state’s virus response. The second phase of the plan was updated this week to include people over 70 as well as those with certain pre-existing health conditions. The first phase of Maine’s vaccine rollout has prioritized health care workers and both workers and residents at long-term care facilities, plus first responders and critical COVID-19 response personnel.