The Biden administration sent letters to superintendents and principals across the United States on Monday, urging them to set up COVID-19 vaccination clinics inside their elementary schools.

"Parents rely on their children’s teachers, principals, school nurses, and other school personnel to help keep their students safe and healthy every school year," U.S. Secretary of Health and Human Services Xavier Becerra and U.S. Secretary of Education Miguel Cardona wrote in the letters. "We need your help now more than ever to continue to protect our communities and our children."

They also asked the school leaders to distribute information "from trusted sources" about COVID-19 vaccines to all families with children ages 5 to 11, and to host community engagements with parents in partnership with local pediatricians and "other trusted medical voices" in the community.

"The communications you issue -- in languages accessible to your parents -- will be critical in helping families learn more about the vaccine," Becerra and Cardona wrote.

The letters went out on the same day that first lady Jill Biden and U.S. Surgeon General Vivek Murthy plan to visit an elementary school in McLean, Virginia, that was used as one of the first sites in the country to begin administering the polio vaccine in 1954.

School officials would not be responsible for handling COVID-19 vaccines or giving shots to students. Instead, they would partner with a local vaccine provider already administering shots, such as a pharmacy or community health clinic.

The schools would be allowed to use federal dollars through the American Rescue Plan to offset any costs with providing the space and organizing the vaccine drive.

-ABC News' Anne Flaherty

Green Bay Packers quarterback Aaron Rodgers says he takes full responsibility for anyone who felt misled by his comments about his vaccination status.

“I do realize I am a role model," Rodgers said on "The Pat McAfee Show" Tuesday. "I made some comments that people might have felt were misleading. And to anybody who felt misled by those comments, I take full responsibility for those comments."

Rodgers, who tested positive for COVID-19 last week and is not vaccinated, said Friday that he wasn't hiding his vaccination status, even though he told reporters in August, "I've been immunized."

Rodgers also said Friday that he's allergic to an ingredient in mRNA vaccines.

He added, "I believe strongly in bodily autonomy and the ability to make choices for your body."

Rodgers said Tuesday that he's heard from the team and coaching staff and that he hopes to join meetings via Zoom ahead of Sunday's game. Rodgers added that there is a "small possibility" he doesn't play on Sunday.

Dr. David Dowdy, an epidemiologist at the Johns Hopkins Bloomberg School of Public Health, told ABC News in September that severe allergies to the vaccines are extremely uncommon and are experienced by less than one in 1 million people, according to health data.

The CDC said: "If you have had a severe allergic reaction or an immediate allergic reaction -- even if it was not severe -- to any ingredient in an mRNA COVID-19 vaccine, you should not get either of the currently available mRNA COVID-19 vaccines. ... If you aren’t able to get one type of COVID-19 vaccine because you are allergic to an ingredient in that vaccine, ask your doctor if you should get a different type of COVID-19 vaccine."

Dr. Jeff Linder, chief of general internal medicine and geriatrics at Northwestern University Feinberg School of Medicine, told ABC News in September that research so far shows that severe allergic reactions are likely triggered by polyethylene glycol, or PEG, a component of the vaccines.

"An allergy to that is pretty rare," Linder added. "It would have to be documented, as a moderate or severe allergy, before I would consider giving a medical exemption."