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A notice requiring to wear face masks is seen outside a candy store near the Times Square in New York, the United States, July 4, 2020. The number of COVID-19 cases in the United States topped 2.8 million on Saturday, reaching 2,808,003 as of 10:33 a.m. (1433 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Xinhua/Wang Ying)