On Tuesday afternoon, the US Centers for Disease Control announced that the coronavirus that's been spreading within China had made it to the United States. A patient in Washington state is the first confirmed case in the US, although indications are that the disease has already spread to other countries in Asia.
A single patient in Washington had been traveling in Wuhan, the area of China hardest hit by the newly described virus, before returning to the US last week. Shortly after their return, the patient was hospitalized with pneumonia-like symptoms. The hospital staff, based on the travel history and symptoms, suspected that the new virus, called 2019-nCoV, might be at fault, and sent samples in to the CDC for testing. Those tests confirmed the virus' identity.
While the initial cases were confined to people who had been in contact with live animals at a seafood market, suggesting that it should be possible to contain the virus. But since then, the news has gotten worse. In addition to spreading to other countries—Thailand and Japan had confirmed cases prior to the US—the virus is now confirmed to be spreading through human contact, which has helped increase the number of cases and enabled its spread to other cities within China. There have also been a number of reported fatalities, although these remain a small percentage of the confirmed infections.