[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 (60.0-80.0% of seroconversions). The live influenza vaccine (LIV) stimulated the production of specific antibodies only in 19.0-35.0% of the vaccinees; most of these vaccinees exhibited positive reaction only to one of the vaccine strains. Following the injection of LIV, the level of postvaccinal immunity was retained for at least 6 months. In the vaccinees receiving both vaccines the tendency towards a decrease in mean geometric titer values was less pronounced (0.2-0.4 log2) than in those receiving only IIV (0.5-0.7 log2). At the period of the rise of influenza morbidity, the contamination rate in the vaccinees with the positive postvaccinal dynamics of antibodies was low (26.0%). The indices of effectiveness were 3.8 for combined vaccination, 3.5 for IIV and 2.6 for LIV. The schedule of vaccination with IIV with the possible revaccination LIV 3-4 weeks later was recommended.