The effect of aggrandizement immunization using attenuated live measles vaccine on measles elimination

Objective To evaluate the effectiveness of measles Supplementary Immunization Activities(SIAs) of measles attenuated live vaccine(MV),explore the effective measures for controlling measles,and provide a scientific basis for measles elimination.Methods Descriptive epidemiology method was used to analyze the data from 2009 to 2010 according to the questionnaires for measles cases,measles surveillance system and the national disease surveillance information reporting system,etc.Results The reported coverage rate and sample investigation coverage rate were 98.66% and 99.21% of the target children,respectively.The coverage rate was over 97% in each age group.There were 118 suspected measles cases reported from measles surveillance system,and 110 measles cases reported from the national disease surveillance information reporting system in 2009.Accordingly,the number of cases was 14 and 7 in 2010,respectively.The measles incidence rate decreased by 93.73% in 2010 after SIAs conducted in 2009.The positive rate of measles IgM antibody was 80% in 2009 and 28.57% in 2010.22.22% of the cases aged 8 months or younger and 16.24% aged above 15 years.There were 62.71% of children who had never received any dose of measles vaccination at all and 3.64% had been injected twice or more.Conclusion The measles SIAs of MV carried out in 2009 played an important role in measles elimination.However,measles immunization strategy should be further studied to help eliminate measles.