Air Recirculation Role in the Spread of COVID-19 Onboard the Diamond Princess Cruise Ship during a Quarantine Period
Air Recirculation Role in the Spread of COVID-19 Onboard the Diamond Princess Cruise Ship during a Quarantine Period
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DOI：
10.4209/aaqr.200495
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发表时间：
2021-04-01
影响因子：
4
通讯作者：
Almilaji, Orouba
中科院分区：
文献类型：
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作者：
Almilaji, Orouba
“钻石公主”号邮轮检测能力高，环境封闭，是独一无二的新型冠状病毒传播案例。本探索性研究旨在通过分析疫情期间船上诊所收集的计数数据，并考虑船舶甲板平面图和空调系统设计，提出通风系统不良在COVID-19传播中的作用的假设。将无确诊病例舱室与有确诊病例舱室在隔离后第5天（潜伏期中位数日）观察到的症状感染率进行比较。因此，在无既往确诊病例的客舱中观察到的有症状感染率（1.2%）高于有既往确诊病例的客舱（0.8%）；然而，差异无统计学意义。此外，年龄似乎并不是一个混杂变量。新冠病毒通过飞机上的通风系统进行空气传播，可以解释在隔离期间，病毒在没有确诊病例的机舱内传播的频率高于预期；因此，这项研究为冠状病毒通过气溶胶传播提供了进一步的潜在证据。根据我们的研究结果，还讨论了涉及钻石公主号爆发的其他研究的相互矛盾的结果。
The Diamond Princess cruise ship is a unique COVID-19 transmission case because of the high testing capacity and the confined environment. This exploratory study aims to raise the hypothesis regarding the role of poor ventilation systems in the spread of COVID-19 by analysing count data collected by the onboard clinic during the outbreak, and considering the deck plan and design of the air conditioning system of the ship. Observed symptomatic infection rate after day 5 (incubation period median day) of the quarantine, in cabins without previous confirmed cases are compared to that in cabins with previous confirmed cases. Accordingly, the observed symptomatic infection rate in cabins without a previously confirmed case (1.2%) was higher than for cabins with a previously confirmed case (0.8%); however, the difference was not statistically significant. In addition, age did not appear to be a confounding variable. Airborne transmission of COVID-19 through the ventilation system onboard could explain the higher than expected virus spread into cabins without previously confirmed cases during the quarantine period; thus, this study provides further potential evidence of coronavirus transmission by aerosols. Conflicting results from other studies involving the Diamond Princess outbreak are also discussed in light of our results.