[Method of detecting persons needing reinoculations against measles].

The epidemiological analysis of 118 measles foci and the total morbidity rate in measles in the populated locality has been carried out. The admissible focal and morbidity levels in measles among vaccinated children have been established. The method of selecting groups in need of the repeated immunization against measles has been proposed. The authors state that only serological control in the hemagglutination inhibition test with the use of 1 hemagglutinating unit of the antigen can detect measles-susceptible groups.