Characteristics of the causative agents of the influenza A (H3N2) epidemic in Leningrad in 1983
1984
: Investigation of influenza A (H3N2) epidemic of 1983 in Leningrad revealed simultaneous circulation of 3 antigenic variants similar to A/Bangkok/1/79, A/Bangkok/2/79, and A/Philippines/2/82 with significant predominance of the first antigenic variant. The viruses related to A/Philippines/2/82 comprising one-third of all isolations produced antibodies of a wide spectrum unlike the other two variants whose antisera neutralize actively the homologous virus only. The possibility of selecting epidemic strains of the A/Philippines/2/82 variety as vaccine strain candidates is discussed.
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