The patient in Washington, a man in his 30s, has been released from the hospital. The two Chicago patients have also been released from the hospital.
Thousands of cases have been confirmed in China and more than 1,000 people have died since the start of the year, Chinese officials said. There are dozens of confirmed cases in a handful of other countries as well. There have been three deaths outside of mainland China: One in the Philippines, one in Hong Kong and one in Japan.
Cases of COVID-19, as the illness caused by the coronavirus is called, in the U.S. are confirmed by the Centers for Disease Control and Prevention, based in Atlanta.
As of Feb. 14, 42 states had submitted more than 400 samples for testing. Fifteen have come back positive.