针对儿童脑炎的EV-A71疫苗的实际有效性
Xiuzhen Nie1, Hualei Bai1, Shaoning Wang1
1Department of Infectious Diseases, Jinan Children's Hospital (Children's Hospital Affiliated to Shandong University), Jinan, China.
疫苗EV-A71显著减少49%的儿童严重脑炎. 接种疫苗也会改变肠道病毒的血清型,突出其双重保护作用和需要更广泛的免疫策略.
科学领域:
- 病毒学 病毒学
- 流行病学 流行病学
- 疫苗学 疫苗学 疫苗学
背景情况:
- 肠道病毒71 (EV-A71) 导致严重的神经系统并发症,如脑炎.
- 针对严重结果的EV-A71疫苗的实际有效性及其对循环肠道病毒血清型的影响尚不清楚.
研究的目的:
- 评估EV-A71疫苗在预防儿童严重神经疾病方面的有效性.
- 评估EV-A71疫苗接种对当地肠道病毒血清型分布的影响.
主要方法:
- 在2016-2023年期间,对7823名因肠道病毒感染住院的儿童进行了回顾性研究.
- 414名接种疫苗和7409名未接种疫苗的儿童之间脑炎发病率的比较.
- 在研究期间对肠道病毒血清型分布的分析.
主要成果:
- 接种疫苗的儿童与未接种疫苗的儿童相比,脑炎的相对风险降低了49% (8.5%vs16.7%).
- 疫苗接种后EV-A71病例的比例显著下降,从26.3%降至13.1%.
- 非EV-A71/CVA16血清型成为主导型,到2023年占病例的73.2%.
结论:
- 接种EV-A71疫苗可以直接预防严重的脑炎.
- 接种疫苗通过减少EV-A71的循环和允许其他血清型出现,间接影响肠道病毒流行病学.
- 这些发现支持扩大EV-A71免疫计划和开发多价值疫苗.
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