Methods Infective disease transfer model were explored and the main principle and method of field epidemiological investigation were analyzed.
方法阐述传染病的感染和传播的基本模式，分析现场流行病学调查的基本原理和策略。
Methods Infective disease transfer model were explored and the main principle and method of field epidemiological investigation were analyzed.
方法阐述传染病的感染和传播的基本模式，分析现场流行病学调查的基本原理和策略。
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