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The U.S. CDC raised its response to the Ebola outbreak in the Democratic Republic of Congo to its highest level on Friday, but said the risk of the disease spreading in the United States remained low.
The move, reserved for the most severe health crises, signals growing concern over the rare strain's rapid spread.
美国疾控中心上周五将对刚果（金）埃博拉疫情的响应提升至最高级别，但表示该病毒在美国传播的风险仍然较低。
这一措施通常用于最严重的公共卫生危机，反映出对这一罕见毒株快速扩散的日益担忧。
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