In no instance has the virus spread beyond a first generation of close contacts or caused illness in the general community.
在任何情况下，病毒的传播还没有超出第一代密切接触者或在整个社区引发疾病。
In no instance has the virus spread beyond a first generation of close contacts or caused illness in the general community.
在任何情况下，病毒的传播还没有超出第一代密切接触者或在整个社区引发疾病。
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