Fauci, 81, says he expects to retire by end of Biden's current term: "My time is running out"

Dr. Anthony Fauci, the president's chief medical adviser and the longtime head of the National Institute of Allergy and Infectious Diseases, says it's likely he will retire before the next election. 

Fauci's move would cap a decades-long career helming key parts of the federal government's response to infectious diseases, ranging from the early years of the HIV/AIDS epidemic in the 1980s to the nation's current COVID-19 response. 

"My time is running out. I'm 81 years old," Fauci said in an interview on Australian radio station 3AW, in response to a question about whether he planned to stay at his post if former President Donald Trump won the 2024 election.