[Profile of influenza viruses in Poland 1986-1990].

During the years 1986 through 1990 we isolated 69 strains of influenza viruses of which 43 were A(H3N2), 22--A(H1N1) and 4 B strains. Influenza A(H3N2) viruses isolated in 1986, 1988, 1989 and 1990 were similar to A/Mississippi 1/85, A/Inverness 3491/85, A/Sichuan 2/87 and A/OMS 5389/88. Influenza A(H1N1) viruses isolated in 1987 and 1989 were similar to A/Taiwan 1/86 and A/Singapore 6/86 strains.