The U.S. Food and Drug Administration on Monday approved the Pfizer vaccine for use in kids 12 to 15 years old, and a Centers for Disease Control and Prevention committee will meet Wednesday to vote on emergency use authorization for the vaccine. Arizona kids could start getting shots as early as Thursday.

There are hundreds of COVID-19 vaccine locations in Arizona, but not all of them use Pfizer. That vaccine has the most cumbersome storage requirements of any shot currently in use. So it is available at some pharmacies, but Arizona has been sending most of its Pfizer doses to state-run mass vaccination sites like Gila River Arena or WestWorld of Scottsdale. Those sites take walk-ins or appointments. The state plans to start booking appointments for younger teens 8 a.m. Thursday, pending the OK from the CDC.

“We’re delighted to be able to welcome these young people to state-run mass-vaccination sites starting Thursday,” said Arizona Department of Health Services director Dr. Cara Christ in a press release. “These safe, highly effective, and free vaccines are our best shot at returning to normal, and having more vaccinated individuals gives COVID-19 less of a chance of spreading.”

The Arizona Department of Health Services estimates there are 385,000 12- to 15-year-olds in the state. 

→ Q&AZ: What You Need To Know About Getting The Coronavirus Vaccine In Arizona