Public awareness, news promptness and the measles outbreak in Hong Kong from March to April, 2019
Public awareness, news promptness and the measles outbreak in Hong Kong from March to April, 2019
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DOI：
10.1080/23744235.2020.1717598
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发表时间：
2020-02-03
影响因子：
5.8
通讯作者：
Qin, Jing
中科院分区：
文献类型：
--
作者：
Zhao, Shi;Han, Lefei;Qin, Jing
背景：在全球范围内，麻疹在过去十年中的复苏可能归因于许多因素。2019年3月至4月，香港爆发麻疹疫情，29名机场员工感染。机场管理局每日向公众通报新病例，并于3月23日设立了公众咨询电话/网上平台，并针对未接种疫苗的机场员工开展了紧急疫苗接种计划。目的探讨本次麻疹暴发流行的相关因素。研究方法：我们用随时间变化的有效繁殖数R-eff（t）来量化疫情的传播性，并推导出随时间变化的基本繁殖数R-0（t）。我们研究了当地公众意识或报告延迟与R-0（t）之间的统计关联。结果：我们估计的平均R-0为10.7，95%CI为6.0-29.2。我们发现，R-0（t）与公众意识水平和新病例情况更新的不确定性水平呈负相关。结论：通过最新情况提高公众意识有助于控制疫情。疫苗接种计划的医疗效果不足以立即导致疫情的停止，但它提高了群体免疫力，以防止未来几年在机场爆发疫情。
Background: Globally, a resurgence of measles during the last decade may be attributed to many factors. An unexpected measles outbreak occurred in Hong Kong, and infected 29 airport staff between March and April 2019. The authority updated public on new cases daily, a public enquiry telephone/online platform was set up on March 23, and an emergent vaccination programme was launched targeting unvaccinated airport staff. We aimed to study this measles outbreak and its related factors. Methods: We quantified the transmissibility of the outbreak by the time-varying effective reproduction number, R-eff(t), and inferred the time-varying basic reproduction number, R-0(t). We examined the statistical associations between local public awareness or reporting delay and the R-0(t). Results: Our estimated average R-0 is 10.7 with 95% CI of 6.0-29.2. We found that R-0(t) was negatively associated with the level of public awareness and the level of promptness of situation updates on new cases. Conclusion: Public awareness via situation updates helped to control the outbreak. The medical effects of the vaccination programme was not soon enough to cause the immediate shutting down of the outbreak, but it boosted herd immunity to prevent future airport outbreaks in the next few years.