Howie McCausland, left, of the Mad River Valley Ambulance Service prepares to vaccinate Caleb Carrien, 19, of Barre, Vt., at a COVID-19 vaccination clinic held on Thursday June 17, 2021 in Waterbury, Vt. The state of Vermont was the first state to vaccinate 80% of the eligible population and a big reason the state reached the goal was by offering a variety of small, local vaccination clinics. The four-hour clinic at the the Waterbury offices SunCommon vaccinated seven people. (AP Photo/Wilson Ring)

A sign promoting a walk-in COVID-19 vaccination clinic on Thursday June 17, 2021 in Waterbury, Vt. The state of Vermont was the first state to vaccinate 80% of the eligible population and a big reason the state reached the goal was by offering a variety of small, local vaccination clinics. The four-hour clinic at the the Waterbury offices SunCommon vaccinated seven people. (AP Photo/Wilson Ring)

Ben Smith, of Bristol, Vt., holds his vaccine card after being vaccinated for COVID-19 at a vaccination clinic held on Thursday June 17, 2021 in Waterbury, Vt. The state of Vermont was the first state to vaccinate 80% of the eligible population and a big reason the state reached the goal was by offering a variety of small, local vaccination clinics. The four-hour clinic at the the Waterbury offices SunCommon vaccinated seven people. (AP Photo/Wilson Ring)