CDC Confirms 57 Cases of Coronavirus in US

People wearing masks to prevent the novel coronavirus walk along the Myungdong shopping district in Seoul, South Korea, on Feb. 23, 2020. Chung Sung-Jun/Getty Images

The U.S. Centers for Disease Control and Prevention (CDC) confirmed 57 cases of coronavirus in the United States, an increase of four from Monday.

All of the new cases were evacuees from the Diamond Princess cruise ship, which was held in medical isolation for two weeks off the coast of Japan, CDC officials confirmed to CNN.