为进一步了解流感病毒的变异规律和特点，对四川省近１０年流感病毒分离和病毒抗原情况进行了研究，结果自１９８７年四川出现流感病毒新变种甲／四川／２／８７（Ｈ３Ｎ２）后，１９８９年又首次分离出一株人甲型流感病毒重组株甲／四川／５７／８９（Ｈ１Ｎ２）。１９９３年乙型流感病毒在人群中活动开始加强，至１９９６年已成为优势株。同时它们的抗原性也在发生变异，其变异方向也不一致。在相同时间和相同地点分离出抗原结构不相同的两种乙型病毒。 In order to further understand the variation regularity and characteristics of influenza virus, the isolation of influenza virus and virus antigen in Sichuan province in recent 10 years were studied. As a result, a new influenza virus A / Sichuan / 2/87 (H3N2) In 1989 for the first time isolated a human influenza A virus recombinant strain A / Sichuan / 57/89 (H1N2). Influenza B virus activity began to increase in the population in 1993 and became predominant in 1996. At the same time, their antigenicity is also changing, and its variation direction is also inconsistent. At the same time and the same place isolated two different antigen structure of the virus type B virus.