A new data-driven mathematical model of the novel coronavirus pandemic predicts that the United States will peak in the number of "active" COVID-19 cases around April 20, which marks a critical milestone on the demand for medical resources, said a University of Washington study published on Saturday.

The number of COVID-19 cases in the United States topped 300,000 by 3:40 p.m. local time Saturday (1940 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University.

The number of COVID-19 cases in the United States has topped 140,000, according to the latest tally from Johns Hopkins University's Center for Systems Science and Engineering (CSSE).