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More than 1 million cases of COVID-19 have been diagnosed in the U.S., marking a grim milestone in the country with the most reported coronavirus infections in the world, according to data compiled by .

U.S. deaths from the respiratory virus passed 57,000 on Tuesday, equal to the upper end of estimated flu deaths for the 2019-2020 flu season, according to . The true death rate of COVID-19 is still unclear because of a lack of widespread testing, but current numbers suggest a rate much higher than the flu, which infects between 9 million and 45 million people in the U.S. each year, the CDC .