Chip Getchell administers the first dose of the Moderna COVID-19 vaccine at Delta Ambulance in Waterville on Wednesday morning. A second booster injection is required 28 days later.

Chip Getchell administers the first dose of the Moderna COVID-19 vaccine to Mike Record, a paramedic at Delta Ambulance, in Waterville on Wednesday morning. A second booster injection is required 28 days later.

Chip Getchell administers the first dose of the Moderna COVID-19 vaccine to Jessica Dorgai, a paramedic at Delta Ambulance in Waterville, on Wednesday morning. A second booster injection is required 28 days later.

Chip Getchell measures a dose of the Moderna COVID-19 vaccine as he administers the first doses to EMS staff at Delta Ambulance in Waterville on Wednesday morning. A second booster injection is required 28 days later.

Chip Getchell administers the first dose of the Moderna COVID-19 vaccine at Delta Ambulance in Waterville on Wednesday morning. A second booster injection is required 28 days later.

The first doses of the Moderna COVID-19 vaccine arrived at Delta Ambulance in Waterville on Wednesday. A second booster injection is required 28 days later.

Suphagaphan (Tarn) Ratanamaneechat, a director of medicine at the Redington-Fairview General Hospital in Skowhegan, is vaccinated Wednesday against COVID-19. Oakley Fortin, a pharmacy technician at the hospital, administers the shot. Dr. Tarn and other hospital staff were among the first at the hospital to receive some of the initial 500 dose shipment.

Director of Pharmacy Lisa Caswell draws the hospital's first dose of the Moderna vaccine for COVID-19 into a syringe Wednesday at the Redington-Fairview General Hospital in Skowhegan.

Sam Stanfield, right, a physician assistant with the Redington-Fairview General Hospital Emergency Department, is vaccinated against COVID-19 on Wednesday by Oakley Fortin, a pharmacy technician at the Skowhegan hospital.

Redington-Fairview General Hospital pharmacist Lauren Button, left, and Dr. Gina Gomez laugh together Wednesday after Button vaccinated Gomez with the hospital's first dose of the Moderna vaccine for COVID-19.

Redington-Fairview General Hospital pharmacist Lauren Button, bottom center, vaccinates Gina Gomez on Wednesday with the Skowhegan hospital's first dose of the Moderna vaccine for COVID-19.

Director of Pharmacy Lisa Caswell, left, hands the hospital's first dose of the Moderna COVID-19 vaccine on Wednesday to pharmacist Lauren Button at Redington-Fairview General Hospital in Skowhegan. Dr. Gina Gomez received the first dose.