Photos: American adolescents get the COVID-19 vaccine

U.S. states began using the Pfizer-BioNTech vaccine to inoculate younger adolescents against COVID-19 after advisers to the CDC backed the plan in a unanimous vote.

The U.S. Food and Drug Administration authorized the vaccine for children aged 12 to 15, offering relief to parents eager to get their children back to schools and summer camps.

Grace Mondillo, 13, is prepared to receive the Pfizer-BioNTech COVID-19 vaccine after Pennsylvania authorized the vaccine for those over 12-years-old at Skippack Pharmacy in Schwenksville, Pennsylvania, U.S.

The youngest age previously approved for the Pfizer vaccine was 16 years old. | Grace Peterson is inoculated with Pfizer's vaccine.

Esteban Vega waits to be inoculated with Pfizer's vaccine.

Cayla Crume is inoculated with Pfizer's vaccine against COVID-19.

Aidan Mohl is inoculated with Pfizer's vaccine against COVID-19.

Maddy Yoo is inoculated with Pfizer's vaccine against COVID-19.

Registered Medical Assistant Melissa Dalton inoculates a teenager the Pfizer's vaccine against COVID-19 in Decatur, Georgia.

Cooper Semrad, 15, is inoculated with Pfizer's vaccine against COVID-19.

Timothy Frilingos watches as his son, Paul Frilingos, 15, is inoculated with Pfizer's vaccine against COVID-19.

Family members look on as Jack Frilingos, 12, is inoculated with Pfizer's vaccine against COVID-19.

A teenager is inoculated with Pfizer's vaccine against COVID-19.

Pfizer is running a separate vaccine trial in children as young as 6 months old, and has said it expects data on 2 to 11 year olds in September.