1977年新甲_1型流感病毒在我省及辽宁、天津等地发生以来,1978年至1980年末,我局所在地吉林市,只分离到甲_3型流感病毒,抗原与京科79-2相近。 1981年初,吉林铁路局某校突然发生了大批感冒病人,该校共有师生812人,12天内共发生感冒病人413人,发病率为50.86％。发病集中在25岁以下的青年人。 In 1977, a new type of H1N1 virus in our province and Liaoning, Tianjin and other places since 1978, to the end of 1980, our bureau is located in Jilin City, only isolated from influenza type A_3, antigens and Beijing Branch 79-2 similar. In early 1981, there were a sudden a large number of cold patients in a school in Jilin Railway Bureau. There were 812 teachers and students in the school. There were 413 cold patients within 12 days, with a prevalence of 50.86%. The incidence of concentrated in young people under the age of 25.