WASHINGTON — Dr. Anthony Fauci said coronavirus cases could grow to 100,000 a day in the U.S. if Americans don’t start following public health recommendations.

The nation’s leading infectious disease expert made the remark at a Senate hearing on reopening schools and workplaces.

Asked to forecast the outcome of recent surges in some states, Fauci said he can’t make an accurate prediction but believes it will be “very disturbing.”

“We are now having 40-plus-thousand new cases a day. I would not be surprised if we go up to 100,000 a day if this does not turn around, and so I am very concerned,” said Fauci, infectious disease chief at the National Institutes of Health.

Fauci said areas seeing recent outbreaks are putting the entire nation at risk, including areas that have made progress in reducing COVID-19 cases. He cited recent video footage of people socializing in crowds, often without masks, and otherwise ignoring safety guidelines.

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HERE’S WHAT YOU NEED TO KNOW ABOUT THE VIRUS OUTBREAK:

— Experts say the pandemic is wreaking havoc in poor and war-torn nations.

— Virus cases worldwide hit 10 million and deaths have surpassed 500,000.

— UK PM Boris Johnson says the pandemic “has been a disaster” for Britain.

— Hunger stalks Yemen’s children as pandemic hits Arab world’s poorest nation.

— Nurses, doctors feel strain as virus races through Arizona.

— The pandemic means millions of women in Africa and other developing regions could lose years of success in contributing to household incomes and asserting their independence.

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Follow all of AP’s pandemic coverage at http://apnews.com/VirusOutbreak and https://apnews.com/UnderstandingtheOutbreak