接种COVID-19疫苗是否降低了将SARS-CoV-2传播给其他人的风险?
1University Medicine Greifswald, Ferdinand-Sauerbruch-Strasse, 17475, Greifswald, Germany. guenter.kampf@uni-greifswald.de.
Advances in experimental medicine and biology
|September 16, 2024
概括
接种COVID-19疫苗并不能持续降低病毒载量或显著降低SARS-CoV-2传播风险. 有证据表明,接种疫苗的个体可能对他人不那么传染,这挑战了先前的假设.
科学领域:
- 病毒学 病毒学
- 流行病学 流行病学
- 免疫学 免疫学 免疫学
背景情况:
- * 假设COVID-19疫苗可以减少病毒传播.
- *病毒载量和传染性是传播动态的关键因素.
研究的目的:
- *评估COVID-19疫苗接种对SARS-CoV-2传播的影响.
- * 评估接种疫苗和未接种疫苗的人群中的病毒载量和传染性.
主要方法:
- *分析了不同SARS-CoV-2变种主导时期 (三角形,欧米克朗) 病毒载荷数据.
- *对检查二次性发作率的传播研究的审查.
- *检查公共卫生数据的病例数和疫苗接种情况.
主要成果:
- * 接种疫苗的个体的病毒载量在三角洲疫情期间并不比未接种疫苗的个体总是低;奥米克朗病毒的病毒载量较高.
- * 在接种疫苗的人群中,传染性SARS-CoV-2水平仅部分较低.
- *二次发作率受到接触群体的疫苗接种状况的影响,而不仅仅是指数病例.
- *现实数据表明,接种疫苗和增强疫苗的人群中的病例数量较高.
结论:
- *目前的证据没有令人信服地证明,COVID-19疫苗接种显著降低了SARS-CoV-2传播的风险.
- *由于疫苗接种导致传播减少的假设需要进一步调查,特别是考虑到变种演变.
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