Serum anti-mumps IgG antibody levels among children aged 0 to 4 years in Haishu District / 预防医学

Objective@#To investigate the serum anti-mumps IgG antibody levels among children aged 0 to 4 years in Haishu District, Ningbo City, Zhejiang Province, so as to provide insights into improvements for mumps vaccination program.@*Methods@#Children aged 0 to 4 years were sampled from Haishu District using a stratified random sampling method in 2016 (before adjustment of the mumps vaccination program) and 2022 (after adjustment of the mumps vaccination program). Participants' demographics were collected using questionnaires, and the coverage of mumps-containing vaccines was collected from the Ningbo Municipal Immunization Information System. Serum anti-mumps IgG antibody was measured using enzyme-linked immunosorbent assay (ELISA), and the seroprevalence of anti-mumps IgG antibody and geometric mean concentration (GMC) were estimated among children aged 0 to 4 years in 2016 and 2022.@*Results@#A total of 464 children were enrolled in 2016, including 250 boys (53.88%) and 214 girls (46.12%), and there were 301 children receiving mumps-containing vaccines (64.87%). The seroprevalence of anti-mumps IgG antibody were 48.08%, 34.44%, 81.11%, 84.44% and 84.44%, and GMC were 233.86, 351.77, 333.66, 362.29 and 410.72 U/mL. A total of 456 children were recruited in 2022, including 236 boys (51.75%) and 220 girls (48.25%), and there were 427 children receiving mumps-containing vaccines (93.64%). The seroprevalence of anti-mumps IgG antibody were 72.73%, 95.00%, 100.00%, 98.68% and 99.04%, and GMC were 524.05, 1 229.69, 1 623.64, 788.01 and 738.41 U/mL. Higher seroprevalence and GMC of anti-mumps IgG antibody was seen in 2022 than in 2016 among children at all age groups (P<0.05).@*Conclusion@#Following adjustment for vaccination programs, the seroprevalence and GMC of anti-mumps IgG antibody significantly increased among children at ages of 0 to 4 years in Haishu District.

Economic evaluation on new strategy for preventing poliomyelitis in Zhejiang Province / 预防医学

Objective To evaluate the economic effect of new strategy for preventing poliomyelitis in Zhejiang Province. Methods Based on the population of Zhejiang Province in 2016, cost-effectiveness ratio (CER) , benefit-cost ratio (BCR), and net benefit (NB) were applied to calculate the health economic difference for the new strategy and the original strategy as compared to no vaccination strategy. Univariate sensitivity analysis was used to assess the robustness of results with main parameters; including burdens of poliomyelitis, cost of vaccines, and the vaccination program itself, and the discount rate. Results CERdisease, CERdeath, BCR and NB for the new strategy were 1:52700 RMB Yuan per case, 1:1813700 RMB Yuan per case, 12.26 and 796.6622 million and CERdisease, CERdeath, BCR and NB for the original strategy were 1 :32900 RMB Yuan per case, 1 :1133900 RMB Yuan per case, 19.58 and 823.1753 million, respectively. The results of the univariate sensitivity analysis with main parameters were robust. Conclusion The new strategy for preventing poliomyelitis is necessary for this period of the global polio eradication. Though the new strategy appears not as good as the original strategy on economic evaluation, its health economic benefit is significant.

Measles prevention in adolescents: lessons learnt from implementing a high school catch-up vaccination programme in New South Wales, Australia, 2014-2015

Introduction: In response to a significant increase of measles cases and a high percentage of unvaccinated adolescents in New South Wales, Australia, a measles high school catch-up vaccination programme was implemented between August and December 2014. This study aimed to explore the factors affecting school-based supplementary immunization activities (SIAs) and to inform future SIA and routine school-based vaccination programme implementation and service provision. Methods: Focus group analysis was conducted among public health unit (PHU) staff responsible for implementing the SIA catch-up programme. Key areas discussed were pre-programme planning, implementation, resources, consent materials, media activity and future directions for school vaccination programme delivery. Sessions were audio recorded, transcribed verbatim and reviewed. Thematic analysis was conducted to identify the major themes. Results: Two independent focus groups with 32 participants were conducted in January 2015. Barriers to the SIA implementation included lead time, consent processes, interagency collaboration, access to the targeted cohort and the impact of introducing a SIA to an already demanding curriculum and school programme immunization schedule. A positive PHU school coordinator rapport and experience of PHU staff facilitated the implementation. Consideration of different approaches for pre-clinic vaccination status checks, student involvement in the vaccination decision, online consent, workforce sharing between health districts and effective programme planning time were identified for improving future SIA implementation. Conclusion: Although many barriers to school programme implementation have been identified in this study, with adequate resourcing and lead time, SIAs implemented via a routine school vaccination programme are an appropriate model to target adolescents.

Suggested guidelines for vaccination of pigs in Korea

There is no published guideline for the vaccination to pigs even though several vaccine companies suggested the program based on their products. It is very difficult to standardize the program because most of the veterinary vaccines are containing several multivalent antigens depending on the companies. Now, we are suggesting the vaccine programs based on the current situation.

Immune effect and persistence of hepatitis B vaccine in adults by different vaccination programs / 上海预防医学

Objective] To evaluate the immune effect of hepatitis B vaccine by different inocula-ting programs for adults as 0-1-3 month, 0-1-6 month and 0-1-12 month and to provide evidence for the development of adult immunization strategy. [ Methods] In Tongxiang City of Zhejiang Province, 10μg of hepatitis B vaccine was voluntarily inoculated by different immunization programs as 0 -1 -3 month, 0-1-6 month or 0 -1 -12 month among adults aged 16 to 49 years.Quantitative detection of anti-HBs was conducted after 1 month and 1 year of immunization, and the positive seroconversion rates and geometric mean titers of anti-HBs ( GMT) were evaluated. [ Results] Totally 682 subjects were evaluated.The anti-HBs positive rates were 99.85% after 1 month of immunization, and 70.23% after 1 year of immunization.It was observed that GMT of anti-HBs was higher with adults of younger age. [ Conclusion] Adults can achieve better immune effect by inoculation of 10μg of hepatitis B vaccine and when it is done in target population according to 0-1-6 month program,compliance is better and immune effect proves more persistent.It is suggested that hepatitis B vaccine should be inoculated for the adults as early as possible to ensure the effect and persistence of the vaccine.