Dr. Anthony Fauci said it's possible that COVID-19 vaccines will become mandatory in order to travel to other countries or attend school.

"Everything will be on the table for discussion," Fauci, who will be chief medical adviser to President-elect Joe Biden, told Newsweek.

The director of the National Institute of Allergy and Infectious Diseases stressed that it's "not up to me to make a decision," but added that "these are all things that will be discussed [under the Biden administration]."

"I'm not sure [the COVID-19 vaccine] going to be mandatory from a central government standpoint, like federal government mandates," Fauci said, though he added that he's "sure" that some individual institutions will require the shot.

Fauci said vaccine requirements in schools are "possible," but they would come from mandates at the state or city level.

"A citywide school system might require it in some cities but not other cities. And that's what I mean by things not being done centrally but locally," Fauci said.