A virus that has killed at least six and sickened hundreds in China has made its way to the United States. The Centers for Disease Control say a man in his 30s was diagnosed with the coronavirus in Seattle, Washington. Here's what to know about this quick-moving disease. Officials say it originated in Wuhan, a Chinese city of about 11 million people. The outbreak seems to have started at a food market. InsideEdition.com's Mara Montalbano has more.