In a given area, the worst will usually be over in four to six weeks as the virus rushes through a susceptible population, cases peak and infections decline with equal speed.

 
  • 在既定区域,最坏的情况是,当病毒急匆匆地冲向易感人群后的四到六周内,病例数到达顶峰,接着匀速下降。
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