一种基于监测的新方法,用于估计自然感染后免疫力下降的程度
Ryosuke Omori1, Hiam Chemaitelly2, Laith J Abu-Raddad3
1Division of Bioinformatics, International Institute for Zoonosis Control, Hokkaido University, Sapporo, Hokkaido, Japan.
Public health
|October 30, 2025
概括
对SARS-CoV-2的自然免疫力根据变种不同地减弱. 预防前Omicron感染是持久的,而Omicron诱导的免疫力在一年内迅速下降.
科学领域:
- 流行病学 流行病学
- 免疫学 免疫学 免疫学
- 公共卫生 公共卫生
背景情况:
- 了解自然免疫的持续时间对于管理传染病至关重要.
- 评估免疫耐久性的传统方法需要大量的数据,这往往是不可用的.
- 建议采用使用常规测试数据的基于监测的新方法.
研究的目的:
- 通过常规监测数据引入和验证一种用于估计免疫衰退的新方法.
- 为了量化自然免疫力对SARS-CoV-2再感染的耐久性,在Omicron前和Omicron变种之后.
- 为了比较不同SARS-CoV-2菌株引起的免疫力减弱模式.
主要方法:
- 使用数学建模来估计随着时间的推移对再感染的保护.
- 该方法应用于卡塔尔的国家SARS-CoV-2测试数据.
- 使用戈珀茨函数来适应衰减曲线,根据现有文献进行验证.
主要成果:
- 在Omicron前的感染提供了强有力的,持续的保护,防止同源的再感染,最小的衰退.
- 经过Omicron感染后的免疫力最初显示出高的保护性,但迅速下降,大约在一年内减少.
- 拟合的衰减曲线与先前公布的估计结果有很好的一致性.
结论:
- 开发的方法为估计免疫衰退提供了一个实用而灵活的工具.
- 这种方法适用于各种环境和不同的传染病原体.
- 这些发现突出了基于SARS-CoV-2变种暴露的自然免疫力持久性的显著差异.
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