Multi‐zone modeling of probable SARS virus transmission by airflow between flats in Block E, Amoy Gardens
Identifieur interne : 000291 ( Istex/Curation ); précédent : 000290; suivant : 000292Multi‐zone modeling of probable SARS virus transmission by airflow between flats in Block E, Amoy Gardens
Auteurs : Y. Li [République populaire de Chine] ; S. Duan [République populaire de Chine] ; I. T. S. Yu [République populaire de Chine] ; T. W. Wong [République populaire de Chine]Source :
- Indoor Air [ 0905-6947 ] ; 2005-04.
Abstract
Abstract More than 300 residents of a private high‐rise housing estate were infected with severe acute respiratory syndrome within a short period during the 2003 epidemic in Hong Kong. The outbreak occurred after the identified index patient visited a flat on a middle floor in Block E of the Amoy Gardens estate on two nights. Approximately 45% of the subsequently infected people resided in Block E, while the other 55% of infected cases mainly resided in six other blocks close to Block E. The distribution of the infected flats in Block E conformed to a non‐uniform spatial pattern. Probable environmental causes for airborne transmission associated with the air movements between flats in Block E are identified. The well‐established multi‐zone airflow modeling method was used to analyze the virus‐laden bio‐aerosol dispersion between flats through door and window leakage areas in Block E under six different scenarios. The distribution of infection risk in Block E matched with the virus concentrations in flats predicted with the use of multi‐zone modeling. Our study shows the importance of ventilation design in high‐rise residential apartments.
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DOI: 10.1111/j.1600-0668.2004.00318.x
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<front><div type="abstract" xml:lang="en">Abstract More than 300 residents of a private high‐rise housing estate were infected with severe acute respiratory syndrome within a short period during the 2003 epidemic in Hong Kong. The outbreak occurred after the identified index patient visited a flat on a middle floor in Block E of the Amoy Gardens estate on two nights. Approximately 45% of the subsequently infected people resided in Block E, while the other 55% of infected cases mainly resided in six other blocks close to Block E. The distribution of the infected flats in Block E conformed to a non‐uniform spatial pattern. Probable environmental causes for airborne transmission associated with the air movements between flats in Block E are identified. The well‐established multi‐zone airflow modeling method was used to analyze the virus‐laden bio‐aerosol dispersion between flats through door and window leakage areas in Block E under six different scenarios. The distribution of infection risk in Block E matched with the virus concentrations in flats predicted with the use of multi‐zone modeling. Our study shows the importance of ventilation design in high‐rise residential apartments.</div>
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