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麻疹病毒:世卫组织在两年内第二次关注国际公共卫生紧急情况
1Department of Biosystems, Laboratory of Gene Technology, KU Leuven, Leuven, Belgium.
Microbial biotechnology
|April 7, 2025
概括
马博克斯疫情,特别是中非的第I类疫情,正在增加,使制复杂化. 虽然疫苗显示出希望,但性行为改变是制2022年流行病的关键.
科学领域:
- 流行病学 流行病学
- 病毒学 病毒学
- 公共卫生 公共卫生
背景情况:
- 刚果民主共和国 (刚果民主共和国) 的病 (mpox) 病例显著增加,I类病毒发生率在1980年至2007年间急剧上升,并在2023年至2024年之间继续增加一倍.
- 2024年,在刚果民主共和国东部发现了一种新的类 Ib mpox 病毒,其突变谱有利于人与人之间的传播,主要通过异性接触感染成年人.
- 制mopox的挑战包括无症状感染,症状前的病毒泄漏,超级传播事件和快速诊断的需要.
研究的目的:
- 分析mopox爆发的流行病学趋势和特征,包括I类和新发现的IB类.
- 评估各种干预措施的有效性,包括疫苗接种和行为改变,以控制mopox传播.
- 审查针对mopox.现有和新兴医疗对策的有效性.
主要方法:
- 对刚果民主共和国过去和最近的mopox发病率数据进行分析,区分分类和传播模式.
- 临床试验数据和关于mopox疫苗和抗病毒治疗疗法的观察性研究的综述.
- 评估公共卫生干预措施,包括隔离协议和行为改变,对疫情控制的影响.
主要成果:
- 刚果民主共和国的Clade I mpox发病率急剧上升,在2023年至2024年期间观察到3.3%的病例死亡率.
- 在2022年疫情期间,性行为修改在制mopox传播方面比疫苗接种更有效.
- 小天花疫苗 (Dryvax,MVA) 已证明具有保护性,MVA在对IIb类mpox.两剂后达到75%以上的疗效. mRNA疫苗在群中对I类和II类mpox.都表现出优异的保护.
结论:
- 马博克斯,特别是I类和新兴的Ib类,构成了持续且不断变化的公共卫生威胁,特别是在中非.
- 疫苗接种策略需要进一步优化,以及开发快速诊断和有效的抗病毒药物.
- 了解传播动态,包括性传播和无症状病例,对于有效的mopox控制和预防至关重要.
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