The Lessons of SARS Never Really Left Hong Kong. Will That Help Stop a Coronavirus Outbreak?

For the past week, Hong Kong retail store owner Dora Ho has been wearing a medical mask wherever she goes. She doesn't let her husband leave the house without one, either.

The couple have a dozen boxes of them at home, and started their stockpile as news reports began to pour in about a deadly, pneumonia-like coronavirus that first emerged in the central Chinese city of Wuhan.