Hagerup-Jenssen Maria, Kongsrud Sigrun, Riise Øystein Rolandsen
Department of Infectious Disease Registries, Norwegian Institute of Public Health, Oslo, Noway.
Department of Vaccine Preventable Diseases, Norwegian Institute of Public Health, Oslo, Noway.
Euro Surveill. 2017 Apr 27;22(17). doi: 10.2807/1560-7917.ES.2017.22.17.30518.
In 2014, Norway became aware of potential low vaccination coverage for the second dose of measles-mumps-rubella vaccine (MMR2) in six of 19 counties. This was detected by comparing the national coverage (NC) for 16-year-olds extracted from the national immunisation registry SYSVAK with the annual status update for elimination of measles and rubella (ASU) reported to the World Health Organization (WHO). The existing method for calculating NC in 2014 did not show MMR2 coverage. ASU reporting on MMR2 was significantly lower then the NC and below the WHO-recommended 95% coverage. SYSVAK is based on the Norwegian personal identification numbers, which allows monitoring of vaccinations at aggregateded as well as individual level. It is an important tool for active surveillance of the performance of the Norwegian Childhood Immunisation Programme (NCIP). The method for calculating NC was improved in 2015 to reflect MMR2 coverage for 16-year-olds. As a result, Norway has improved its real-time surveillance and monitoring of the actual MMR2 coverage also through SYSVAK (the annual publication of NC). Vaccinators receive feedback for follow-up if 15-year-olds are missing MMR2. In 2017, only three counties had an MMR2 coverage below 90%.
2014年，挪威意识到19个郡中有6个郡的麻疹-腮腺炎-风疹联合疫苗第二剂（MMR2）接种覆盖率可能较低。这是通过将从国家免疫登记系统SYSVAK中提取的16岁人群的全国覆盖率（NC）与向世界卫生组织（WHO）报告的麻疹和风疹消除年度状况更新（ASU）进行比较而发现的。2014年计算NC的现有方法未显示MMR2覆盖率。MMR2的ASU报告率明显低于NC，且低于WHO建议的95%的覆盖率。SYSVAK基于挪威个人身份号码，可在汇总和个体层面监测疫苗接种情况。它是对挪威儿童免疫规划（NCIP）实施情况进行主动监测的重要工具。2015年改进了计算NC的方法，以反映16岁人群的MMR2覆盖率。因此，挪威还通过SYSVAK（NC的年度发布）改进了对实际MMR2覆盖率的实时监测。如果15岁儿童未接种MMR2，疫苗接种人员会收到后续反馈。2017年，只有三个郡的MMR2覆盖率低于90%。
