Dr. Anthony Fauci

Updated at 4:15 p.m. ET

A coronavirus vaccine could be ready for distribution by the end of the year, and distributed to Americans in 2021, the nation's top infectious disease specialist told lawmakers Friday.

While it typically takes years to develop vaccines, new technologies, the lack of bureaucratic red tape and the human body's robust immune response to COVID-19 have hastened the process, Dr. Anthony Fauci said.

Updated at 6:12 p.m. ET

Dr. Anthony Fauci, the government's top infectious disease expert, said recent White House attacks on his record are backfiring, calling the episode "bizarre" in interviews with The Atlantic.

Updated at 2:45 p.m. ET

President Trump once again questioned the expertise of his top public health officials Monday morning, retweeting a conspiracy theory from former game show host Chuck Woolery, who suggested that the Centers for Disease Control and Prevention, the "Media, Democrats [and] our Doctors" are lying about COVID-19 in an effort to hurt Trump in November's general election.

While conceding missteps in the federal response to the coronavirus, Dr. Anthony Fauci said Wednesday it is not too late to avoid the dire picture he outlined in congressional testimony of 100,000 coronavirus cases a day.

Updated at 1:40 p.m. ET

Dr. Anthony Fauci, the country's top infectious disease expert, told members of Congress on Tuesday that although he can't predict the ultimate number of infections and deaths related to the coronavirus, "it's going to be very disturbing."

Updated at 3:30 p.m. ET

The White House Coronavirus Task Force renewed calls for vigilance on Friday, acknowledging rising cases across Southern states and in parts of California.

Updated at 2:50 p.m. ET

At a hearing Tuesday on Capitol Hill, Dr. Anthony Fauci of the National Institutes of Health and other federal officials said that no one had told them — including President Trump — to slow down testing for the coronavirus. The statements came after Trump has repeatedly said that more testing would lead to more infections being revealed.

While it's still unclear when, if ever, Major League Baseball will play a 2020 season, a new recommendation from Dr. Anthony Fauci may have the league consider an earlier ending.

Fauci, director of the National Institute of Allergy and Infectious Diseases, said in an interview with The Los Angeles Times that he would recommend the league finish its postseason before October.

Sen. Rand Paul, R-Ky., had sharp words for Dr. Anthony Fauci, the nation's top infectious disease expert, during Tuesday's Senate committee hearing on the coronavirus.

In arguing for reopening the economy and schools, Paul said, "As much as I respect you, Dr. Fauci, I don't think you're the end-all. I don't think you're the one person who gets to make a decision."

Paul pointed to the mortality rate in New York City of young people up to age 18, which he said was near zero — much lower than for older people.

Updated at 2:05 p.m. ET Sunday

Three members of the White House's coronavirus task force, including Dr. Anthony Fauci, are quarantining themselves after coming into contact with someone who has tested positive for the coronavirus.

Stephen Hahn, commissioner of the Food and Drug Administration, and Robert Redfield, the director of the Centers for Disease Control and Prevention, have decided to self-quarantine for two weeks.

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