Evaluation on surveillance of routine immunization coverage in Beijing, 2017

Abstract

Objective To analyze the status of surveillance system for routine immunization coverage of the National Immunization Program (NIP) vaccines in Beijing, 2017, and to evaluate the level of coverage and the quality of the reports. Methods The reliability of the reported coverage of the NIP vaccines was evaluated based on the survey of coverage rates by probability proportional to size (PPS) method. Results In 2017, the reported coverage rates for every dose of NIP vaccines were >98.00% for both local and migrant children in Beijing, while the investigated coverage rates of NIP vaccines among resident children of 1-3 years old were >99.00%. There was no statistically significant difference between the reported and investigated coverage rates. Conclusions The routine immunization surveillance system worked well. The coverage of NIP vaccines maintained at high level among mobile and local children in Beijing. The routine surveillance data of coverage were reliable. Key words: Routine immunization; Surveillance; Reported coverage rate; Investigated coverage rate; Evaluation