美国官员表示，美国已警告莫斯科，其未披露西伯利亚鼠疫研究中心一名实验室工作人员死亡的详细信息，违背了其国际卫生义务。
The U.S. has warned Moscow that its failure to disclose details about the death of a lab worker from a plague research center in Siberia runs counter to its international health obligations, U.S. officials said.
美国官员称，俄罗斯向美国提供的关于这一神秘事件的信息很少，这引发了人们担心传染病可能在俄罗斯国内乃至国外传播。
Russia has provided the U.S. with little information about the mysterious episode, which has stirred fears that an infectious disease might spread inside Russia and beyond the country’s borders, American officials say.