China on Thursday locked down two cities at the epicenter of a coronavirus outbreak that has killed 17 people and infected nearly 600, as health authorities around the world took action to prevent a global pandemic.
Health officials fear the transmission rate will accelerate as hundreds of millions of Chinese travel at home and abroad during week-long holidays for the Lunar New Year, which begins on Saturday.
The previously unknown virus strain is believed to have emerged late last year from illegally traded wildlife at an animal market in the central Chinese city of Wuhan.
Most transport in Wuhan, a city of 11 million people, was suspended on Thursday morning and people were told not to leave. Hours later, neighboring Huanggang, a city of about 7 million people, announced a similar lockdown.