Lazareva T A, Andreeva E A, Vaserin Iu I, Slobodeniuk A V, Mal'chikov I A
Zh Mikrobiol Epidemiol Immunobiol. 1984 Feb(2):63-7.
In 1976-1981 the etiology of influenza epidemics was mixed, influenza viruses A(H3N2), A(H1N1) and B taking part in them simultaneously. The active circulation of influenza virus strains with different antigenic structures was established: influenza virus A(H3N2) circulated in 1976, and since November 1977 simultaneous spread of influenza viruses A(H3N2) and A(H1N1) was observed, the epidemic activity of strain A(H3N2) being noticeably decreased during this period; in the autumn and winter months of 1979-1980 this strain appeared as the dominating infective agent. After intensive epidemics during the summer months of 1976 and 1980 influenza virus strains A(H3N2), antigenically related to the causative agent of the previous epidemic, were isolated from patients with acute respiratory infection. The cases of double infection with influenza viruses A and B were recorded.
1976年至1981年期间，流感流行的病因较为复杂，甲型（H3N2）、甲型（H1N1）和乙型流感病毒同时参与其中。不同抗原结构的流感病毒株呈现出活跃的传播态势：1976年流行的是甲型（H3N2）流感病毒，自1977年11月起，甲型（H3N2）和甲型（H1N1）流感病毒同时传播，在此期间甲型（H3N2）毒株的流行活动显著下降；在1979年至1980年的秋冬季节，该毒株成为主要的感染源。1976年和1980年夏季出现流感大流行后，从急性呼吸道感染患者中分离出与上一次流行病原体抗原相关的甲型（H3N2）流感病毒株。还记录到甲型和乙型流感病毒双重感染的病例。
