Reasons for the incidence of measles in vaccinated children

During the period of mass immunization, the incidence of measles decreased by 8.1 times, during the period of active routine vaccination - 1: 5 times compared with the pre-vaccination period. In recent years, measles has "matured": the incidence among children 10 years and older has increased. As a result of anti-measles immunization, the bulk of children (80.5%) develop immunity with a concentration of anti-measles antibodies in a dilution of 1: 40 - 1: 20. At the same time, factors associated with a violation of the immunization technique, the age of the vaccinated, affect the intensity of vaccine immunity. the period that has passed after vaccination, the quality of the biological product, the acute infectious viral and intestinal diseases suffered in the pre and post-vaccination period. The reason for the rise in the incidence of measles in 1974-4975. there was a low immune layer, a loss of post-vaccination measles immunity within 1-6 years after vaccination.