二、发病因素（epidemic factor）：高温、高湿有利于此病的发生。在华东及中南各省茶区，一般以夏秋季发病较多；在云南勐海茶区每年3月至11月均有发生，以6月至7月...
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disease cycle and epidemic factor 病害循环及发病因素
anti-epidemic factor 防控因子
epidemic factor analysis 流行因素分析
epidemic growth factor 表皮生长因子
epidemic apthogenic factor 疫疠气
epidemic pathogenic factor [中医] 疠气
Objective in order to investigate the evolution of EHF epidemic regularity due to change of epidemic factor of EHF.
目的为了探明流行性出血热流行因素的变化，导致其流行规律演变。
Objective to get to know the epidemic feature and rule of epidemic hemorrhagic fever as well as its incidence and epidemic factor.
目的了解出血热流行特点与规律以及发病和流行的因素。
Our ability to be responsive to changes in the epidemic is a central factor if we are to succeed.
要想获得成功，加强我们应对流行病变化的能力是一主要因素。
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