在泰国老年人群中,作为第二剂补充剂注射的重复皮内mRNACOVID-19疫苗的免疫性和反应性
Prasert Assantachai1, Suvimol Niyomnaitham2,3, Zheng Quan Toh4,5
1Department of Preventive and Social Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
Frontiers in immunology
|January 26, 2024
概括
在老年人中,第二次COVID-19增强疫苗接种显示了抗体反应的增加. 肌内 (IM) 疫苗接种比皮内 (ID) 疫苗接种产生更高的抗体标位,IM路线的局部副作用较少.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 老年医学 老年医学
背景情况:
- 年长的成年人面临更高的COVID-19风险.
- 关于65岁以上成年人接种COVID-19疫苗的数据有限.
- 短时间的疫苗疗效需要对高风险群体进行强剂.
研究的目的:
- 在65岁以上的成年人中,比较第二次皮肤内 (ID) 与肌肉内 (IM) COVID-19助推剂的免疫性和反应性.
- 在第二次增剂后评估针对SARS-CoV-2变体的抗体反应.
主要方法:
- 一个单一中心的前性队列研究,涉及91名65岁以上的参与者.
- 参与者通过相同的路径 (ID或IM) 接受了第二次助推剂 (mRNA-1273或BNT162b2),与他们的第一个助推剂一样.
- 针对武汉和Omicron亚型的抗体标位 (IgG和中和) 在接种疫苗后2周被测量.
主要成果:
- 所有组都显示了强化剂后显著的抗体增加.
- 肌内 (IM) 疗法通常导致较高的抗体几何平均标位 (GMT) 与皮内 (ID) 疗法相比.
- 与ID BNT162b2.2.2相比,ID mRNA-1273疫苗的局部不良事件更为频繁.
结论:
- 重复的分量皮内接种 (ID) 疫苗为老年人群提供了潜在的替代性强剂策略.
- 在老年人中,肌内接种 (IM) 疫苗可能与ID疫苗接种相比,提供更好的抗体反应.
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