Fauci is one of the most prominent members of President Trump's coronavirus task force and polls show he is among the most trusted public officials when it comes to the coronavirus. But his media appearances, during which he urged Americans to stay home, wear masks and take other precautions, often put him at odds with Trump.

Fauci was also a critic of Scott Atlas, who advised Trump on the pandemic before he resigned Wednesday. Atlas pushed back on many coronavirus restrictions, arguing that young and healthy people should be allowed to resume their lives as normal because they are less likely to become seriously ill if they contract the virus. 

The news comes as coronavirus cases across the country spike during the holiday season. Fauci and other public health experts are urging Americans to avoid travel and large gatherings as much as possible, in addition to practicing social distancing and wearing a mask. 

Biden also said during the interview that he plans on asking the American public to wear a mask in an effort to reduce the spread of the coronavirus pandemic. 

"Just 100 days to mask, not forever. 100 days. And I think we'll see a significant reduction," the president-elect said.