随着时间的推移,SARS-CoV-2 的连续间隔因非药物干预而缩短
Sheikh Taslim Ali1, Lin Wang2,3, Eric H Y Lau1
1WHO Collaborating Centre for Infectious Disease Epidemiology and Control, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China.
Science (New York, N.Y.)
|July 23, 2020
概括
2020年1月至2月期间,由于隔离病例等干预措施,COVID-19的连续间隔从7.8日减少到2.6天. 这一发现改善了COVID-19传播和控制措施的估计.
科学领域:
- 流行病学
- 传染病的发展动态
背景情况:
- COVID-19 流行病学参数的估计,如序列间隔和繁殖数量,有所不同.
- 序列间隔对于了解传染病的传播链至关重要.
研究的目的:
- 分析COVID-19系列间隔的时间变化.
- 评估非药物干预对COVID-19传播动态的影响.
- 将实时序列间隔估计与复制数估计的固定分布进行比较.
主要方法:
- 在中国大陆编制SARS-CoV-2传播对的线路列表数据库.
- 时间间序列分布的分析 (2020年1月9日至2月13日).
- 实时与固定的序列间隔方法进行复制数估计的比较.
主要成果:
- 在一个月内,COVID-19的平均连续间隔从7.8日大幅缩短到2.6天.
- 这种缩短与加强非药物干预措施的实施相关,特别是病例隔离.
- 随时间变化的序列间隔的实时估计产生了比固定分布更准确的复制数估计.
结论:
- 非药物干预,特别是病例隔离,有效地减少了COVID-19的连续间隔.
- 序列间隔的动态估计提高了传输评估和预测的准确性.
- 这些发现支持改善控制传染病爆发的策略.
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