High attack rate in a Tong Lau house outbreak of COVID-19 with subdivided units in Hong Kong.

Autor:	Wang Q; Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, People's Republic of China., Lung DC; Department of Pathology, Hong Kong Children's Hospital, Hong Kong SAR, People's Republic of China.; Department of Pathology, Queen Elizabeth Hospital, Hong Kong SAR, People's Republic of China., Chan PT; Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, People's Republic of China., Jia W; Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, People's Republic of China., Dung CH; Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, People's Republic of China., Miao T; Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, People's Republic of China., Huang J; Department of Urban Planning and Design, Faculty of Architecture, The University of Hong Kong, Hong Kong SAR, People's Republic of China., Chen W; Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, People's Republic of China., Wang Z; Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, People's Republic of China., Leung KM; Environmental Protection Department, Hong Kong SAR, People's Republic of China., Xu P; Institute of Applied Mathematics, Academy of Mathematics and Systems Sciences, Chinese Academy of Sciences, Beijing, People's Republic of China., Lin Z; Division of Building Science and Technology, City University of Hong Kong, Hong Kong SAR, People's Republic of China., Wong D; Estates office, The University of Hong Kong, Hong Kong SAR, People's Republic of China., Tse H; Department of Pathology, Hong Kong Children's Hospital, Hong Kong SAR, People's Republic of China., Ying Wong SC; Department of Pathology, Hong Kong Children's Hospital, Hong Kong SAR, People's Republic of China., Choi GK; Department of Pathology, Hong Kong Children's Hospital, Hong Kong SAR, People's Republic of China., To KK; Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, People's Republic of China., Cheng VC; Department of Microbiology, Queen Mary Hospital, Hong Kong SAR, People's Republic of China., Yuen KY; Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, People's Republic of China., Li Y; Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, People's Republic of China.
Jazyk:	angličtina
Zdroj:	Interface focus [Interface Focus] 2022 Feb 11; Vol. 12 (2), pp. 20210063. Date of Electronic Publication: 2022 Feb 11 (Print Publication: 2022).
DOI:	10.1098/rsfs.2021.0063
Abstrakt:	Poor housing conditions are known to be associated with infectious diseases such as high Coronavirus disease 2019 (COVID-19) incidences. Transmission causes of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in poor housing conditions can be complex. An understanding of the exact mechanism of transmission can help to pinpoint contributing environmental issues. Here, we investigated a Hong Kong COVID-19 outbreak in early 2021 in four traditional Tong Lau houses with subdivided units. There are more than 80 subdivided units of less than 20 m 2 floor area each on average. With a total of 34 confirmed COVID-19 cases, the outbreak had an attack rate of 25.4%, being one of the highest attack rates observed in Hong Kong, and ranked among the highest attack rates in reported outbreaks internationally. Tracer gas leakage and decay measurements were performed in the drainage system and in the subdivided units to determine the transport of infectious aerosols by the owner-modified sophisticated wastewater drainage pipe networks and the poor ventilation conditions in some subdivided units. The results show that the outbreak was probably due to multiple transmission routes, i.e. by the drainage pipe spread of stack aerosols, which is enhanced by poor ventilation in the subdivided units. (© 2022 The Authors.)
Databáze:	MEDLINE
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