USA top infectious disease expert Anthony Faucisaid on Friday that he is "cautiously optimistic" that the US could have coronavirus vaccine in late fall or early winter this year.
Fauci said it was a complex question, but described some of the contributing factors.
And Rep.Jim Jordan, R-Ohio tried to press Fauci into saying that demonstrations against police violence toward Black Americans spread the virus and should be curbed.
Fauci, who is helping to guide the United States government's coronavirus response, told a House of Representatives subcommittee on Friday he is "cautiously optimistic that we will have a vaccine by the end of this year and as we go into 2021".
He added that any crowded gatherings where people were not wearing face masks posed a risk.
States reopening without following federal guidelines crafted with his input led to a surge in COVID-19 cases, Dr. Anthony Fauci told Congress on Friday.
In a House hearing Friday on the White House's response to the coronavirus pandemic, Majority Whip James Clyburn, D-S.C., said President Donald Trump's administration has failed to draw up a national strategy to fight the spread of COVID-19.
U.S. Rep. Jim Jordan, R-Urbana, speaks during a House Select Subcommittee hearing on the coronavirus on Friday on Capitol Hill in Washington.
"I do not believe that there will be vaccines so far ahead of us that we will have to depend on other countries to get us vaccines", Dr. Fauci said. "You make comments on dating, on baseball and everything you could imagine".
"You make all kinds of recommendations", Jordan said, taking aim at Fauci.
"I don't know how many times I can answer that", Fauci replied.
Jordan then asked Fauci, "Should the government limit the protesting?" Jordan asked. "And if you stood right outside of that same business and protested you wouldn't get arrested?" "I'm not going to opine on limiting anything ..."
A drive-through testing centre is shown earlier this month in Inglewood, Calif. Admiral Brett Giroir, part of the administration's coronavirus task force, admitted that many test results are not coming back promptly. However, the shutdown of the USA only worked for about 50 percent of the country.
"So you're allowed to protest - millions of people on one day, in crowds, yelling, screaming - but you try to run your business, you get arrested?"
Democrats were also no exception, as congresswoman Maxine Waters blamed the recent Covid-19 death of former presidential candidate Herman Cain on the no-mask Trump rally he attended before testing positive for the virus, making a political statement out of supposed condolences.
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