People are seen on the National Mall in Washington, D.C., the United States, on Sept. 6, 2021. The total number of COVID-19 cases in the United States topped 40 million on Monday, according to data from the Johns Hopkins University. (Xinhua/Liu Jie)
U.S. COVID-19 cases surpass 40 mln -- Johns Hopkins University
Source: Xinhua| 2021-09-07 04:24:54|Editor: huaxia
U.S.,COVID,19 cases
