A woman rides a bike in Washington, D.C., the United States, on July 17, 2020. The number of COVID-19 cases in the United States surpassed 3.6 million on Friday, reaching 3,604,408 as of 12:34 p.m. local time (1634 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Xinhua/Liu Jie)

A woman wearing a face mask walks a dog in Washington, D.C., the United States, on July 17, 2020. The number of COVID-19 cases in the United States surpassed 3.6 million on Friday, reaching 3,604,408 as of 12:34 p.m. local time (1634 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Xinhua/Liu Jie)

Photo taken on July 17, 2020 shows the U.S. Capitol Building in Washington, D.C., the United States. The number of COVID-19 cases in the United States surpassed 3.6 million on Friday, reaching 3,604,408 as of 12:34 p.m. local time (1634 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Xinhua/Liu Jie)