在SARS-CoV-2感染后的儿童中对抗原性先进的Omicron BA.5免疫力进行中和
Edward A Belongia1, Joshua G Petrie1, Leora R Feldstein2
1Center for Clinical Epidemiology and Population Health, Marshfield Clinic Research Institute, Marshfield, Wisconsin, USA.
Journal of the Pediatric Infectious Diseases Society
|December 23, 2023
概括
在儿童中,Omicron BA.5的血清中和在Omicron BA.1/BA.2变体期间感染后高于Delta时期. 接种疫苗还提高了儿童的BA.5中和标位.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 儿科 儿科 儿科
背景情况:
- 了解对SARS-CoV-2变种的免疫反应对于公共卫生至关重要.
- 以前的SARS-CoV-2浪潮,包括Delta和Omicron亚型,引起了不同的免疫反应.
- 对像Omicron BA.5这样的新兴变体进行中和能力的评估是必不可少的,特别是在儿科患者群体中.
研究的目的:
- 为了评估儿童的Omicron BA.5亚变体的血清中和.
- 根据之前的SARS-CoV-2变种时期 (Delta与Omicron BA.1/BA.2) 进行中和标位比较.
- 评估疫苗接种状态对儿童的Omicron BA.5中和的影响.
主要方法:
- 血清样本从以前感染过SARS-CoV-2的儿童中收集.
- 进行了中和试验,以测量对Omicron BA.5亚变体的抗体标位.
- 分析了数据,比较了不同变种时期感染的儿童和疫苗接种情况.
主要成果:
- 与Delta变体相比,在Omicron BA.1/BA.2期间感染的儿童中,康复者对Omicron BA.5的血清中和标位显著更高.
- 接种疫苗的儿童比未接种疫苗的儿童具有更高的BA.5中和标位.
- 不同年龄组的BA.5位数没有显著差异.
结论:
- 之前感染Omicron BA.1/BA.2的儿童与之前感染的Delta相比,在儿童中获得了更好的对Omicron BA.5的交叉中和.
- 疫苗接种增强了儿童群体对Omicron BA.5的中和抗体反应.
- 在这个队列中,年龄似乎不是BA.5中和的主要决定因素.
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