When the components of clinical illness (infection and signs or symptoms) were examined separately, sleep efficiency but not sleep duration was associated with signs and symptoms of illness.
对临床疾病的组成(传染性和症状)分别进行研究的时候，睡眠质量而不是睡眠时间和感冒的症状有关。
Previous research showed that prions bind readily to these types of surfaces and can initiate infection with remarkable efficiency.
此前研究显示朊蛋白可便捷地与这些表面类型结合并以不同寻常的效率启动感染过程。
It is necessary to drop the infection efficiency by over 85% through protection measures for reducing the basic reproduction rate below the critical level.
防护措施必须使感染效率下降85 %以上，才能使医院内传播的基本繁殖率降至临界值以下。
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