Pima County vaccination sites started offering Pfizer booster shots for 12- to 15-year-olds on Jan. 6, following federal approval a day earlier.
Anyone in that age group is eligible providing it has been at least five months from their second dose.
Previously, only those 16 and over were eligible to receive booster doses. Only the Pfizer vaccine and booster is available for 12- to 17-year-olds. The Pfizer vaccine is authorized for children as young as 5 years old.
The Moderna and Johnson & Johnson vaccines are available to those 18 and over.