通过混合免疫接种扩大免疫印记和中和谱,在三剂疫苗接种后,在SARS-CoV-2变种突破性感染后进行突破性免疫接种
Tingting Jia1, Fuxiang Wang1, Yihao Chen2
1School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, PR China; School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou 510275, PR China.
The Journal of infection
|November 28, 2024
概括
从SARS-CoV-2感染和接种疫苗的混合免疫扩大了中和抗体反应. 未来的疫苗应该针对当前的变种,促进剂距离更远,以获得最佳的混合免疫力.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
背景情况:
- 为了有效开发疫苗,SARS-CoV-2的进化需要了解混合免疫力.
- 突破性感染和再感染突显了对广泛疫苗的需求.
研究的目的:
- 为了研究不同SARS-CoV-2暴露史的个体中和抗体 (nAb) 反应.
- 评估疫苗接种和连续感染对抗体宽度和耐久性的影响.
主要方法:
- 分析了来自四个队伍的血 (接种疫苗,BA.5突破,XBB突破,BA.5-XBB连续感染).
- 中和抗体水平与祖先的SARS-CoV-2,前Omicron变种,Omicron亚变种和SARS-CoV-1进行了测量.
主要成果:
- 由于免疫印记,Omicron突破感染增加了对祖先/Omicron前菌株的nAbs.
- XBB突破性感染显示出比BA.5突破性感染更广泛的中和,表明免疫性更高.
- 接种疫苗后连续的BA.5-XBB感染扩大了中和,但减少了nAb持续时间.
结论:
- 之前的SARS-CoV-2暴露和接种疫苗会产生持续的,扩展的免疫印记.
- 未来的疫苗必须针对新兴变种,并且应优化增强剂间隔以实现混合免疫力.
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