[The validation of the expediency of a review of the times for revaccinating children against measles].

Basing on the results of seroepidemiological study, carried out in two districts of Moscow by different methods, cluster selection method including, the authors have developed the following recommendations aimed at improving the strategy of revaccination against measles: (1) selective revaccination of only seronegative children or those with poor antimeasles immunity should be carried out, thus making it possible to reduce the number of susceptible children and diminish the risk of postimmunization reactions and complications; (2) when determining the groups of children to be revaccinated and the age suitable for revaccination, one should bear in mind the specific local features of the epidemic process in measles and the morbidity values, as well as the data on antimeasles immunity in children of different age groups; (3) serologic monitoring of the quality and immunologic effectiveness of different batches of live measles vaccine permits timely removal of nonstandard batches from practical use, thus improving the efficacy of vaccinal prophylaxis of measles.