The 2019 novel coronavirus was first detected in Wuhan, China, a city with a population topping 11 million. It's since spread to two dozen other countries, including the United States and Canada.
In the U.S., 12 people have been confirmed as having been infected with the coronavirus: six in California, two in Illinois, one in Massachusetts, one in Arizona, one in Washington and one in Wisconsin.
The World Health Organization has declared coronavirus a global health emergency. Officials with the Centers for Disease Control and Prevention have recommended travelers “avoid all nonessential travel to China” as the virus continues to spread.
Health officials recommend that any people who have recently traveled to Wuhan and subsequently experienced flu-like symptoms -- including fever, coughing, shortness of breath or a sore throat -- contact their health care providers.