[Seroconversion after vaccine with trivalent influenza vaccine during the epidemic season 1990/1 in Poland]

Vaccination was performed by influenza virus vaccine, trivalent type A and B. We vaccinated about 50,000 persons in Poland in different groups of age. HI and NI tests were used for testing antibody level for A/Taiwan/1/86 (H1N1), A/Shanghai/16/89 (H3N2) and B/Yamagata/16/89. The rise of antibody level was statistically significant.