Evidence map›Paper›PMID 33746341›Full record

ArticleBuilding and environment2021

Probable airborne transmission of SARS-CoV-2 in a poorly ventilated restaurant.

Yuguo Li, Hua Qian, Jian Hang, Xuguang Chen, Pan Cheng, Hong Ling, Shengqi Wang, Peng Liang, Jiansen Li, Shenglan Xiao and 4 more

Open access · greenAbstract read
In one paragraph

Article in Building and environment, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 208 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
208citing papers in PubMed, 6 pooled it
69.6field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

208 citing papers in PubMed, 6 syntheses or guidelines pooled it, 549 citations in OpenAlex.

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  2. Non-pharmaceutical interventions for COVID-19: a systematic review on environmental control measures.Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · 2023
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148 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

14 authors at 6 institutions in 2 countries.

Yuguo LiDepartment of Mechanical Engineering, The University of Hong Kong, Hong Kong, China.
Hua QianSchool of Energy and Environment, Southeast University, Nanjing, China.
Jian HangSchool of Atmospheric Sciences, Sun Yat-sen University and Key Laboratory of Tropical Atmosphere-Ocean System, Ministry of Education, Zhuhai, China.
Xuguang ChenGuangdong Provincial Center for Disease Control and Prevention, Guangzhou, China.
Pan ChengDepartment of Mechanical Engineering, The University of Hong Kong, Hong Kong, China.
Hong LingSchool of Atmospheric Sciences, Sun Yat-sen University and Key Laboratory of Tropical Atmosphere-Ocean System, Ministry of Education, Zhuhai, China.
Shengqi WangSchool of Energy and Environment, Southeast University, Nanjing, China.
Peng LiangGuangdong Field Epidemiology Training Program, Ganzi Tibetan Autonomous Prefecture Center for Disease Control and Prevention, Sichuan, China.
Jiansen LiGuangdong Provincial Center for Disease Control and Prevention, Guangzhou, China.
Shenglan XiaoDepartment of Mechanical Engineering, The University of Hong Kong, Hong Kong, China.
Jianjian WeiInstitute of Refrigeration and Cryogenics and Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Zhejiang University, Hangzhou, China.
Li LiuSchool of Architecture, Tsinghua University, Beijing, China.
Benjamin J CowlingSchool of Public Health, The University of Hong Kong, Hong Kong, China.
Min KangGuangdong Provincial Center for Disease Control and Prevention, Guangzhou, China.
Guangdong Provincial Center for Disease Control and Prevention · CNSun Yat-sen University · CNUniversity of Hong Kong · HKSoutheast University · CNTsinghua University · CNZhejiang University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Although airborne transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been recognized, the condition of ventilation for its occurrence is still being debated. We analyzed a coronavirus disease 2019 (COVID-19) outbreak involving three families in a restaurant in Guangzhou, China, assessed the possibility of airborne transmission, and characterized the associated environmental conditions. We collected epidemiological data, obtained a full video recording and seating records from the restaurant, and measured the dispersion of a warm tracer gas as a surrogate for exhaled droplets from the index case. Computer simulations were performed to simulate the spread of fine exhaled droplets. We compared the in-room location of subsequently infected cases and spread of the simulated virus-laden aerosol tracer. The ventilation rate was measured using the tracer gas concentration decay method. This outbreak involved ten infected persons in three families (A, B, C). All ten persons ate lunch at three neighboring tables at the same restaurant on January 24, 2020. None of the restaurant staff or the 68 patrons at the other 15 tables became infected. During this occasion, the measured ventilation rate was 0.9 L/s per person. No close contact or fomite contact was identified, aside from back-to-back sitting in some cases. Analysis of the airflow dynamics indicates that the infection distribution is consistent with a spread pattern representative of long-range transmission of exhaled virus-laden aerosols. Airborne transmission of the SARS-CoV-2 virus is possible in crowded space with a ventilation rate of 1 L/s per person.

Indexed as

Aerosol transmissionAirborne transmissionBuilding ventilationCOVID-19SARS-CoV-2

Identifiers

PMID33746341
PMCPMC7954773
OpenAlexW3138404950

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.