How the coronavirus spread in the United States

Patient Zero arrived in Seattle from Wuhan on January 15th and developed symptoms by January 19th. He was tested, found positive, and isolated in a specialized unit. Despite his recovery by February 21st, the virus spread due to undetected cases and inefficient testing. Early CDC kits worked well, but later faced issues, complicating containment efforts.

What was the original purpose of the containment ward where Patient Zero was admitted?

What factors contributed to the spread of the novel coronavirus according to health officials?