Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, testifies during a Senate hearing Tuesday on Capitol Hill in Washington. Credit: Jim Lo Scalz / AP

WASHINGTON — Dr. Anthony Fauci said Friday vaccinated Americans would “not necessarily” need to get booster shots this fall for further protection from COVID-19.

Fauci, the nation’s leading infectious disease expert, told CBS “This Morning” that scientists would be tracking data on the virus and possible variants. He said it was still “possible” an additional shot would be needed later this year to ward off possible infection.

Fauci also urged Americans to continue to follow CDC guidelines. He stressed those who haven’t been fully vaccinated still need to wear masks even if they are largely spending time with people who have been inoculated.

The doctor also said those attending indoor sporting events, like the NBA playoffs starting this week, should follow the masking policies of the arena.