一、有关小儿肺炎发病情况及病源体问题:小儿肺炎发病情况目前尚无明确统计,国外资料,上、下呼吸道感染5岁以下发病率占该年龄组50％,5～12岁占30％。北京儿童医院统计、小儿肺炎占住院人数23％,病死率占住院总死亡人数32％。可见小儿肺炎发病率及死亡率均较高。近年来由于国内外病毒学进展很快,发现 First, the incidence of pediatric pneumonia and pathogens Question: The incidence of pneumonia in children is currently no clear statistics, foreign information, upper and lower respiratory tract infection under the age of 5 accounted for 50% of the age group, 5 to 12 years of age accounted for 30%. Beijing Children’s Hospital statistics, pediatric pneumonia accounted for 23% of hospitalizations, the mortality rate accounted for 32% of hospitalized deaths. Can be seen in children with high incidence of pneumonia and mortality. In recent years, rapid progress in virology at home and abroad, found