Surveillance of Measles Immunization in Population of Yuxi City

[Objective] To understand the status of measles immunization in population of Yuxi City,and provide evidence for developing measures of accelerating the elimination of measles.[Methods]A total of 2545 cases were selected from people aged 1~60 years with stratified PPS method.Hemagglutination inhibition(HI) test was conducted for measles HI antibody detection.[Results]The total positive rate of HI antibody was 97.72 %,valence rate of protection was 75.44%.Antibody geometric mean titer(GMT)was 19.70%.Positive rate was lowest in 1~3 years age group;valence rate of protection,GMT was lowest in 16~20 years and 21~25 years age groups,comparing with other age groups,the differences were significant;Population immunity level was highest in dam area.[Conclusion]Measles antibody levels of population in Yuxi City can control epidemic and outbreak of measles,but can not block incoming cases or sporadic cases.Implementation of targeted immunization of measles vaccine and general immunization strategies on infants and adolescents is of great importance in accelerating the elimination of measles.