Chinese officials quarantined three cities that have more than 18 million residents combined in an attempt to curb the outbreak of 2019 Novel Coronavirus, which had spread to at least six other countries as of Jan. 23.
Officials locked down Wuhan, a city of roughly 11 million in southeast China, on Thursday. Officials in nearby Huanggang, population 7.5 million, and Ezhou, which has around one million people, announced quarantines a few hours later.
