突破性感染SARS-CoV-2 omicron有效地提高了之前的BNT162b2疫苗接种中的抗体
Thomas Perkmann1, David N Springer2, Patrick Mucher1
1Department of Laboratory Medicine, Medical University of Vienna, Waehringer Guertel 18-20, Vienna A-1090, Austria.
Journal of clinical virology plus
|July 3, 2023
概括
在三次接种疫苗的个体中,Omicron突破感染显著增加了野生型SARS-CoV-2抗体. 这项研究表明,Omicron通过野生类型检测测量出的抗体水平.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 疫苗学 疫苗学 疫苗学
背景情况:
- BNT162b2疫苗 (基于野生型) 广泛用于COVID-19预防.
- 即使在接种了多次疫苗剂量后,Omicron变异突破性感染 (BTI) 也可能发生.
- 评估BTI后的抗体反应对于了解疫苗有效性和混合免疫力至关重要.
研究的目的:
- 为了确定SARS-CoV-2 Omicron变异突破性感染是否会提高先前接种了三剂野生型BNT162b2疫苗的个体的抗体水平.
- 测量抗体水平使用商用野生类型的基于免疫测试.
主要方法:
- 研究了一组21名接种了三剂BNT162b2疫苗的个人.
- 在2022年3月至9月期间,有16人经历了Omicron突破性感染 (BTI).
- 使用Elecsys SARS-CoV-2 S测试 (Roche) 量化了对受体结合域 (Anti-S) 的抗体,将BTI病例与对照组和原发性Omicron感染的个体进行比较.
主要成果:
- 在BTI患者中,Anti-S水平显著增加,从7,135 U/mL增加到21,705 U/mL.
- 相比之下,原发性Omicron感染的个体显示出非常低的Anti-S结果 (2.25 U/mL).
- 在仅接种疫苗的人群中,Anti-S度从9,120 U/mL下降到3,830 U/mL.
结论:
- 突破性感染Omicron变种有效地提高了与野生型BNT162b2疫苗接种疫苗的个体的野生型SARS-CoV-2抗体.
- 这表明,通过混合免疫 (接种疫苗加感染) 增强免疫的潜力.
- 这些发现强调了在接种疫苗的背景下考虑感染诱导的抗体提升的重要性.
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