The US now has a total of 153,268 fatalities from the virus, and continues to be the world's worst affected country.
All three health officials testified in the Senate a month ago, during which Fauci told lawmakers that the federal government is "not in total control" of the outbreak and warned USA cases could ultimately reach 100,000 per day.
"We feel cautiously optimistic that we will have a vaccine by the end of this year and as we go into 2021", Dr. Fauci said. "Do you see the inconsistency though, Dr. Fauci?"
The hearing comes as the number of new COVID-19 cases keep appearing at a worrisome pace.
In his defense, Fauci said he was "not favoring one crowd versus another crowd".
President Donald Trump, some Republicans in Congress and several conservative media commentators have consistently pushed for the drug's use, many of them widely sharing a video this week extolling its virtues that was produced for the web with funding from the group Tea Party Patriots Action. Instead, it's likely be distributed in phases, but that every American will eventually be able to get it within 2021.
The director of the National Institute of Allergy and Infectious Diseases replied, "I don't think that's relevant. It'll probably be phased in", he said, adding that a committee is working to determine how to prioritize vaccine distribution early on.
"I don't understand what you're asking me, as a public health official, to opine on who should get arrested or not", Fauci responded.
He even said that, in response to Fauci's comments about the measures Americans needs to take, "Fauci is 79, but maybe if he had like 22-year-old kids who were trying to make their way in this world in an economy that is headed down the tubes, thanks largely to his recommendations, he would feel differently". The U.S. government plans to launch studies of additional vaccines every month through the fall.
Fauci responded: "We were in agreement on virtually all of those".
Trials are pivotal for establishing the safety and effectiveness of the vaccines.
"Crowding together, particularly when you're not wearing a mask, contributes to spreading the virus", Fauci said when asked about protests spreading COVID-19.
With another 69,000 cases recorded, the USA has seen a total of more than 4.5 million people known to have been infected since the start of the pandemic.
The congressman then proceeded to dramatically shake a thick stack of supposed Covid-19 guidelines, issued by Trump's administration, saying that if all state governors acted on those "thousands more" would have been alive.
As CNN reported, Russian Federation intends to be the first county in the world to approve a vaccine within the next two weeks. China has also been making rapid progress on a vaccine, according to various reports. When Fauci said he was not in a position to make such a recommendation, the lawmaker retorted: "You make all kinds of recommendations".
"So we started off with a very hard baseline of transmission that was going on at the time that we tried to open up the country".
"I do hope that the Chinese and the Russians are actually testing the vaccine before they are administering the vaccine to anyone", he said.
Conservative Rep. Jordan of OH used his inquiry time to try and trap Dr. Fauci into condemning protests for Black Lives Matter.
While state and local governments lock down bars and restaurants, and limit large gatherings like worship services, mass protests and demonstrations have been left free to flood city streets.