Russia claims it will have a vaccine rolled out by October.
"There's been five randomized control, placebo-controlled trials that do not show any benefit to hydroxychloroquine," Admiral Brett Giroir said.
The Fox anchor took aim at the country's top infectious diseases expert after he spoke before Congress about limiting public gatherings.
Spain, France and Germany have all reported a 35 to 171 percent spike in new cases per 100,000 people in the past 14 days.
"I think Bolsonaro invented that he was contaminated in order to advertise the medicine," former Brazilian president Luiz Inácio Lula da Silva said.
The total is 12 percent more than at the start of July.
Forecast now says that by November 1, if mandates are eased further, almost 26,000 people will die from the disease.
Around one in 150 people infected with West Nile virus develop a serious illness.
Meanwhile, Russian officials have claimed they may have a vaccine approved by August.
The state's seven-day rolling average of new deaths has spiked by 50 percent since last week.
President Donald Trump has repeatedly touted the anti-malaria drug as a COVID-19 treatment, despite a lack of evidence.
Professor Tara Spires-Jones of the U.K. Dementia Research Institute at the University of Edinburgh said the "well-conducted" report was "important" but hoped it didn't lead people to blame themselves if they get dementia.
Co-author Sara Borgomaneri, of the University of Bologna, told Newsweek: "The study underlines the importance of memory reconsolidation, and of the possibility that our past memories can be rewritten somehow.
The latest daily death toll marked the state's largest single-day spike in fatalities since the outbreak began.
Young children had more coronavirus traces in their noses than older kids and adults, a study found.
The seven-day rolling average of daily new deaths in Sweden has also been declining for months.
Hydroxychloroquine has been touted as a treatment and preventative measure for COVID-19 by President Donald Trump.
The positivity rate among children also spiked in just over a week, according to the Florida Department of Health.
Fauci made the comments as the president of the Association of American Medical Colleges said the U.S. death toll could reach "multiples of hundreds of thousands" if things don't change.
Almost 80 percent of recovered COVID-19 patients suffered damage to their heart.