Faith Walsh, a nurse with the United States Public Health Service, documents a vial of Moderna (COVID-19) vaccine before opening the clinic in Eagle, Alaska, U.S., March 31, 2021.

Faith Walsh, a nurse with the United States Public Health Service, prepares a single vial of Moderna (COVID-19) vaccine in Eagle, Alaska, U.S., March 31, 2021.

First Chief of the Tribal Eagle Village Karma Ulvi greets a team of healthcare workers with the Tanana Chiefs Conference at a (COVID-19) vaccination site in Eagle, Alaska, U.S., March 31, 2021.

A resident of the tribal village drives near the (COVID-19) vaccination site in Eagle, Alaska, U.S., March 31, 2021.

Tribal and non-tribal patients wait in an observation area after receiving their (COVID-19) vaccines at the Chief Andrew Isaac Health Center in Fairbanks, Alaska, U.S., March 30, 2021.

Healthcare workers vaccinate tribal and non-tribal patients at the Chief Andrew Isaac Health Center in Fairbanks, Alaska, U.S., March 30, 2021.

Marlys House reacts to her final dose of (COVID-19) vaccine with Tribal Elders Ethel Beck and Bertha Ulvi in Eagle, Alaska, U.S., March 31, 2021.

Nurse Kim Sonderland with the Tanana Chiefs Conference vaccinates a resident in Eagle, Alaska, U.S., March 31, 2021.

Steve Robbins leads his sled dog team across a frozen lake after helping at a vaccination site in Eagle, Alaska, U.S., March 31, 2021.

A single vial of Moderna (COVID-19) vaccine is prepared for travel at the Chief Andrew Isaac Health Center in Fairbanks, Alaska, U.S., March 31, 2021.

Faith Walsh, a nurse with the United States Public Health Service, prepares a single vial of Moderna (COVID-19) vaccine in Eagle, Alaska, U.S., March 31, 2021.

Nurse Practitioner Kim Sonderland speaks with tribal villagers before beginning their (COVID-19) vaccines in Eagle, Alaska, U.S., March 31, 2021.

Nurse Practitioner Kim Sonderland administers a Moderna (COVID-19) vaccine to Andy Bassich in Eagle, Alaska, U.S., March 31, 2021.

A temporary gravesite, built after a 2009 flood that destroyed the tribe's historic cemetery, is seen in Eagle, Alaska, U.S., March 31, 2021. Tribal leaders credit their quick actions against COVID-19 to their memories of past pandemics that killed large percentages of the Alaskan Tribal population.

A view of an aviation map marking the location of Eagle, Alaska, U.S., March 31, 2021.

A healthcare worker with the Tanana Chiefs Conference boards a flight in Fairbanks, Alaska, U.S., March 31, 2021.

Cassius Caldwell, 16, receives a (COVID-19) vaccine at the Chief Andrew Isaac Health Center in Fairbanks, Alaska, U.S., March 30, 2021.

Steve Robbins leads his sled dog team across a frozen lake after helping at a vaccination site in Eagle, Alaska, U.S., March 31, 2021.

Marlys House reacts to her final dose of (COVID-19) vaccine with Tribal Elders Ethel Beck and Bertha Ulvi in Eagle, Alaska, U.S., March 31, 2021.

Crystal Stordahl, director of the Community Health Aide Program for the Tanana Chiefs Conference, transports a single vial of (COVID-19) vaccines to the airport in Fairbanks, Alaska, U.S., March 31, 2021.

Brittany Karma, staff pharmacist at the Chief Andrew Isaac Health Center, checks a previous month's flight schedule while preparing a single vial of Moderna (COVID-19) vaccine early in the morning in Fairbanks, Alaska, U.S., March 31, 2021.

Pharmacists at the Chief Andrew Isaac Health Center unpack a new shipment of Pfizer (COVID-19) vaccine doses in Fairbanks, Alaska, U.S., March 30, 2021.

A view of the Yukon River near the Canadian border and Eagle, Alaska, U.S., March 31, 2021.

Faith Walsh, a nurse with the United States Public Health Service, speaks with Marlys House prior to her (COVID-19) vaccine in Eagle, Alaska, U.S., March 31, 2021.

An elementary school student at Eagle Community School works on his tablet in a socially distanced class in Eagle, Alaska, U.S., March 31, 2021.

Crystal Stordahl, director of the community health aide program for the Tanana Chiefs Conference, hands off a cooler containing a single vial of Moderna (COVID-19) vaccine to the Physicians Assistant Jo Miller at an airport in Fairbanks, Alaska, U.S., March 31, 2021.

Faith Walsh, a nurse with the United States Public Health Service, carries a cooler containing a single vial of Moderna (COVID-19) vaccine while en route to in Eagle, Alaska, U.S., March 31, 2021.

Elementary school students wear masks while completing school work at Eagle Community School in Eagle, Alaska, U.S., March 31, 2021.

A team of healthcare workers with the Tanana Chiefs Conference walk to board a flight in Fairbanks, Alaska, U.S., March 31, 2021.

A healthcare worker tags (COVID-19) vaccines at the Chief Andrew Isaac Health Center in Fairbanks, Alaska, U.S., March 31, 2021.

A nurse works during a vaccination for tribal and non-tribal patients at the Chief Andrew Isaac Health Center in Fairbanks, Alaska, U.S., March 30, 2021.

A recently vaccinated patient waves goodbye while leaving the Chief Andrew Isaac Health Center observation area in Fairbanks, Alaska, U.S., March 30, 2021.

United States Public Health Service nurse, Faith Walsh carries a cooler containing a single vial of Moderna coronavirus disease (COVID-19) vaccine to her flight out of Fairbanks, Alaska, U.S., March 31, 2021.

Steve Robbins unhooks his sled dog team after mushing to a vaccination site to help, amid the coronavirus disease (COVID-19) pandemic, in Eagle, Alaska, U.S., March 31, 2021.

Steve Robbins stops his sled dog team after mushing to help at a vaccination site in Eagle, Alaska, U.S., March 31, 2021.

A team of healthcare workers with the Tanana Chiefs Conference walk to board a flight in Fairbanks, Alaska, U.S., March 31, 2021.

A view of the Yukon River near the Canadian border and Eagle, Alaska, U.S., March 31, 2021.

Nurse Practitioner Kim Sonderland administers a Moderna (COVID-19) vaccine to a tribal resident of Eagle, Alaska, U.S., March 31, 2021.

Brittany Karma, staff pharmacist at the Chief Andrew Isaac Health Center, prepares a single vial of Moderna (COVID-19) vaccine for travel early in the morning in Fairbanks, Alaska, U.S., March 31, 2021.

A tribal work crew packs their gear after building a quarantine shelter, intended for use in the case of a positive COVID-19 case in Eagle, Alaska, U.S., March 31, 2021.

Faith Walsh, a nurse with the United States Public Health Service, carries a cooler containing a single vial of Moderna (COVID-19) vaccine while en route to in Eagle, Alaska, U.S., March 31, 2021.

A view of the Alaskan landscape while flying to Eagle, Alaska, U.S., March 31, 2021.

Pharmacists at the Chief Andrew Isaac Health Center unpack a new shipment of Pfizer (COVID-19) vaccine doses in Fairbanks, Alaska, U.S., March 30, 2021.

Frankie Webster, 18, receives a (COVID-19) vaccine at the Chief Andrew Isaac Health Center in Fairbanks, Alaska, U.S., March 30, 2021.

Nurse Practitioner Kim Sonderland and Faith Walsh, a nurse with the United States Public Health Service, rest before transporting a single vial of Moderna (COVID-19) vaccine in Fairbanks, Alaska, U.S., March 31, 2021.

First Chief of the Tribal Eagle Village Karma Ulvi greets a sled dog team led by Steve Robbins, who crossed a frozen lake to help with vaccinations, in Eagle, Alaska, U.S., March 31, 2021.

Nurse Practitioner Kim Sonderland watches the landscape while flying a single vial of Moderna (COVID-19) vaccine to Eagle, Alaska, U.S., March 31, 2021.