感染和接种疫苗诱导的SARS-CoV-2抗体在多个时间点的动态变化和趋势
Shihan Zhang1,2, Xiaoxiao Kong3, Qian Zhen4
1Department of Epidemiology and Health Statistics, School of Public Health, Southeast University, Nanjing, China.
Journal of medical virology
|January 9, 2025
概括
经过Omicron BA.5感染后的混合免疫力显示长期保持高IgG抗体水平. 增剂注射显著降低了血清逆转风险,特别是在老年人中,突出了定制疫苗接种策略的必要性.
科学领域:
- 免疫学 免疫学 免疫学
- 流行病学 流行病学
- 公共卫生 公共卫生
背景情况:
- 由于COVID-19大流行,需要了解混合免疫 (疫苗接种和感染) 的人群中的抗体动态.
- 调查SARS-CoV-2IgG抗体水平在Omicron BA.5波后和长期持久性对于公共卫生战略至关重要.
研究的目的:
- 在Omicron BA.5波之后,探索社区人口中SARS-CoV-2 IgG抗体水平的多时间点动态.
- 为了评估长期的IgG抗体持久性,感染后近两年.
- 确定影响抗体水平和血清逆转率的因素.
主要方法:
- 在6个月内对2737名参与者进行了长度研究 (2022年12月至2023年6月),并进行了三次随访.
- 2024年10月对230名参与者的横截面血清调查,以确定长期持久性.
- 统计分析使用通用增材模型,通用线性混合模型和卡普兰-梅尔生存分析.
主要成果:
- 超过85%的血清阳性最初在Omicron BA.5波之后;在感染后22个月内持续高血清阳性 (>98%).
- 老年人 (>65岁) 的抗体水平较低,衰退速度更快.
- 补充免疫降低了59.79%的血清逆转风险;多次感染减缓了抗体衰变.
结论:
- 混合免疫力赋予持续的,长期的人口水平IgG免疫力对SARS-CoV-2.
- 量身定制的增强免疫策略对于保持免疫力至关重要,特别是在脆弱的老年人群中.
- 持续的血清学监测对于为疫苗接种政策提供信息和评估人口免疫力至关重要.
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