Immunization coverage of national immunization program in Taizhou, Zhejiang, 2017

Objective To understand the coverage of national immunization program (NIP) in children in Taizhou, Zhejiang province.

Methods The coverage of NIP was investigated in 18 townships selected through stratified cluster sampling in 9 counties of Taizhou through Zhejiang Immunization Information System.

Results A total of 34 265 children, including 23 316 local children and 10 949 migrant children, were investgated. The routine vaccination rates in children aged 2 years remained at high levels and the coverage rates in all counties were above 95%. The vaccination rates of 2^nd dose Japanese encephalitis vaccine (JEV), 4^th dose polio myelitis attenuated live vaccine（PV）and 1^st dose meningococcal polysaccharide vaccine-type A and C (MPV-AC) were all above 98% in children aged 7 years. The vaccination rates of diphtheria-tetanus vaccine (DT) in all counties were above 95%, except Xianju. Compared with other vaccines, the coverage rate of 2^nd MPV-AC was lowest, and it was above 90% only in a few counties, i.e. Huangyan, Linhai, Yuhuan, Tiantai and Sanmen. The coverage rates in local children were higher than those in migrant children. The differences in coverage rates of Bacillus Calmette-Guérin (BCG), 4^th dose PV, 1^st dose diphtheria tetanus and pertussis vaccine (DTP), 4^th dose DTP, 2 doses meningococcal polysaccharide vaccine-type A (MPV-A), 2 doses MPV-AC, 2^nd dose JEV, hepatitis A vaccine (HepA) and DT were significant between local children and migrant children.

Conclusion The Immunization coverage of NIP remained at a high level in both local children and migrant children. However, the coverage rates in migrant children were lower than those in local children. Also, migrant children got vaccination later than local children did. Therefore, we should strengthen the management of migrant children.