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Characteristic of humoral response of elderly to inactivated influenza vaccine.

Eighty persons immunized with inactivated influenza vaccine in 1990-1991 epidemic season were examined. Serological tests: hemagglutination inhibition (HI), lectin neuraminidase (LN) and Western blot were performed with serum specimens taken before and 3-4 weeks after vaccination. Distribution of anti-influenza antibodies in the subclass was also examined. The results revealed humoral response to vaccine strains of influenza virus and also to strains caused infections in the past.