Volunteers give students school supplies before they return to school at Blue Lick Elementary School in Louisville, Kentucky, U.S., August 9, 2021.

High school students return on the first day of school, amid the coronavirus (COVID-19) pandemic, at Hillsborough High School in Tampa, Florida, U.S., August 10, 2021.

High school students return on the first day of school, amid the coronavirus (COVID-19) pandemic, at Hillsborough High School in Tampa, Florida, U.S., August 10, 2021.

A parent walks their children on the first day of school, amid the coronavirus (COVID-19) pandemic, at West Tampa Elementary School in Tampa, Florida, U.S., August 10, 2021.

A principal gives a student a mask to attend orientation at Blue Lick Elementary School in Louisville, Kentucky, U.S., August 9, 2021.

A mother walks her daughter on the first day of school, amid the coronavirus (COVID-19) pandemic, at West Tampa Elementary School in Tampa, Florida, U.S., August 10, 2021.

A teacher talks to parents during orientation at Blue Lick Elementary School in Louisville, Kentucky, U.S., August 9, 2021.

High school students return on the first day of school, amid the coronavirus (COVID-19) pandemic, at Hillsborough High School in Tampa, Florida, U.S., August 10, 2021.

A crossing guard stops traffic while students return on the first day of school, amid the coronavirus (COVID-19) pandemic, at West Tampa Elementary School in Tampa, Florida, U.S., August 10, 2021.

A teacher hugs her student as they attend orientation at Blue Lick Elementary School in Louisville, Kentucky, U.S., August 9, 2021.

Students return on the first day of school amid the coronavirus (COVID-19) pandemic at West Tampa Elementary School in Tampa, Florida, U.S., August 10, 2021.

Lisa Placeres takes a photo of her son Daniel Fiallo on the first day of school, amid the coronavirus (COVID-19) pandemic, at Hillsborough High School in Tampa, Florida, U.S., August 10, 2021.

A parent walks their son on the first day of school, amid the coronavirus (COVID-19) pandemic, at West Tampa Elementary School in Tampa, Florida, U.S., August 10, 2021.

Students register to receive orientation before returning to school at Blue Lick Elementary School in Louisville, Kentucky, U.S., August 9, 2021.

A student runs to hug her teacher, Miss Webber, during orientation at Blue Lick Elementary School in Louisville, Kentucky, U.S., August 9, 2021.

Students return on the first day of school amid the coronavirus (COVID-19) pandemic in Tampa, Florida, U.S., August 10, 2021.

Barbara Barton watches her grandchildren return on the first day of school, amid the coronavirus (COVID-19) pandemic, in Tampa, Florida, U.S., August 10, 2021.

Students return on the first day of school, amid the coronavirus (COVID-19) pandemic, at West Tampa Elementary School in Tampa, Florida, U.S., August 10, 2021.

Parents walk their children on the first day of school, amid the coronavirus (COVID-19) pandemic, at West Tampa Elementary School in Tampa, Florida, U.S., August 10, 2021.

A principal walks students to the gym in order to receive school supplies before returning to school at Blue Lick Elementary School in Louisville, Kentucky, U.S., August 9, 2021.