群传播时间
Group dissemination time
以上为机器翻译结果，长、整句建议使用 人工翻译 。
适应性变异最初表现为小群人发病，一些证据显示人际传播，这或许可给世界一些时间采取防御行动。
Adaptive mutation, expressed initially as small clusters of human cases with some evidence of human-to-human transmission, would probably give the world some time to take defensive action.
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