[Antineuraminidase activity of inactivated influenza vaccines in elderly people].

The antineuraminidase activity of 5 inactivated split and subunit influenza vaccines (IIV) was studied in individuals aged above 65 years. Postvaccinal antibody titers were determined in the lectin test. All the vaccines were shown to have a high antigenicity, by providing high titers of neuraminidase antibodies in most vaccinated persons: The mean geometric titers (MGT) to influenza viruses A(H1N1) and A(H3N2), and B were 7.

[Comparative evaluation of the reactogenicity and immunogenicity of inactivated influenza vaccines in the elderly].

A comparative study was carried out to assess reactogenicity and immunogenicity of inactivated influenza vaccines (Begrivac, Vaxigrip, Grippol, Influvac, and Fluarix), licensed in Russia. Immunization of the elderly demonstrated low reactogenicity and high immunogenicity for all vaccines. Concomitant chronic diseases had no influence on the vaccine immunogenicity levels, which testifies to the benefit of vaccination in this age group.

[The choice of the optimal schedules in the vaccination procedure against influenza in elderly subjects].

To improve the vaccinal prophylaxis of influenza, the comparative study of live trivalent influenza allantoic vaccine, dried, for adults, produced by the Irkutsk Enterprise for Immunological Preparations (Russia), and inactivated trivalent influenza split vaccine, obtained from Wyeth-Ayerst Company (USA), as well as schedules of their combined use for the vaccination of elderly persons, was carried out. The examination of 600 subjects revealed that the vaccines were well tolerated; the combined use of these two vaccines, as well as the use of the inactivated influenza vaccine (IIV) alone, ensured high immunogenic activity (60.0-80.

[Use of highly purified subvirion trivalent flue vaccine ("Grippovak") in groups with a high risk of complications].

During the epidemic season of 1989-1990 the subunit vaccine Grippovac was used in 20 asylums for old people and psychoneurological invalids in Moscow for the protection of the inhabitants and the personnel from influenza. Follow-up of the vaccinees during the period from November 1989 to March 1990 revealed that the use of this vaccine decreased the incidence of influenza-like diseases (ILD) 3.4-4.