@ryan_landay Sure, that didn't really happen though. It was a lot in quarantine at peak, but still not close to the entire city (source: multiple personal contacts in Shanghai, none ever quarantined). The main distinction is known vs. unknown cluster.
@ryan\u landay当然，这并不是真的发生。在高峰期隔离了很多人，但仍然没有接近整个城市（来源：上海有多个个人接触者，从未隔离过）。主要区别是已知集群与未知集群。