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急性呼吸道感染（ARI）是婴幼儿期的常见病、多发病，其中肺炎是威胁婴幼儿健康的主要原因[1]。据1991年全国ARI项目县和1993年河南省ARI基础调查结果；肺炎是造成婴幼儿死亡的第一位原因。为了解河南农村婴幼儿ARI发病情况，为ARI的预防研究提供流行病学资料，从而达到降低婴?
Acute respiratory infections (ARI) are infants and young children’s common disease, frequently-occurring disease, of which pneumonia is a major threat to the health of infants and young children [1]. According to the 1991 ARI project counties in the country and the 1993 ARI basic survey results; pneumonia is the first cause of infant deaths. In order to understand the incidence of ARI in infants and young children in rural Henan and to provide epidemiological data for ARI prevention research so as to reduce infants?