San Diego resident Yanjun Wei traveled with her two small children to the city of Wuhan to celebrate the Chinese New Year with her parents. Now the family is holed up in a high-rise apartment building in the megalopolis, believed to be ground zero of the deadly coronavirus outbreak that’s killed more than 200 people and sickened thousands. Over the last week, the Chinese government has put the urban area’s 11 million people under an unprecedented quarantine. Commercial flights, public transportation and even major roads have been shut down, leaving the usually bustling city eerily quiet, according to numerous accounts. “I’m trying not to be emotional here,” said the 37-year-old Wei, tearing up during a video interview with the Union-Tribune using the social-media app WeChat.