作者对南斯拉夫空气污染的zagrt地区二年级学生78名(男45,女33)和相距25公里清洁区samotor的相应年级学生70名(男37,女36)于1977年11月～1978年4月间进行了调查。内容有:用通讯方式了解儿童和家中人患急性呼吸道疾病情况。每二周由父母回答:“家庭中其二周内是否有人生过呼吸道疾病?”,对回答不肯定的或没有回答 The author of the Yagos air pollution in zagrt sophomore 78 (male 45, female 33) and 25 kilometers apart samotor clean area corresponding grade 70 students (male 37, female 36) in November 1977 ~ April 1978 Between the investigation. The content includes: To understand the situation of children and family members suffering from acute respiratory diseases by means of communication. Every second week, parents answer: “Is there any human respiratory disease in the family within two weeks?”, No answer or answer to the answer