Evidence map›Paper›PMID 34062182›Full record

ArticleThe Journal of infection2021

Evidence for lack of transmission by close contact and surface touch in a restaurant outbreak of COVID-19.

Nan Zhang, Xuguang Chen, Wei Jia, Tianyi Jin, Shenglan Xiao, Wenzhao Chen, Jian Hang, Cuiyun Ou, Hao Lei, Hua Qian and 10 more

Abstract read
In one paragraph

Article in The Journal of infection, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
39citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

39 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Analysis of SARS-CoV-2 Transmission by Airborne Droplets in a Restaurant Outbreak: A CFD Approach.The Canadian journal of infectious diseases & medical microbiology = Journal canadien des maladies infectieuses et de la microbiologie medicale · 2025
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  15. Local travel behaviour under continuing COVID-19 waves- A proxy for pandemic fatigue?Transportation research interdisciplinary perspectives · 2023
    Article
  16. Article
  17. Transmission of SARS-CoV-2 in the workplace: Key findings from a rapid review of the literature.Aerosol science and technology : the journal of the American Association for Aerosol Research · 2023
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

20 authors.

Nan ZhangBeijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing, China.
Xuguang ChenGuangdong Provincial Center for Disease Control and Prevention, Guangdong province, China.
Wei JiaDepartment of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong.
Tianyi JinBeijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing, China.
Shenglan XiaoSchool of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, China.
Wenzhao ChenDepartment of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong.
Jian HangSchool of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, China.
Cuiyun OuSchool of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, China.
Hao LeiSchool of Public Health, Zhejiang University, Hangzhou, Zhejiang, China.
Hua QianSchool of Energy and Environment, Southeast University, Nanjing, China.
Boni SuChina Electric Power Planning & Engineering Institute, Beijing, China.
Jiansen LiGuangdong Provincial Center for Disease Control and Prevention, Guangdong province, China.
Dongmei LiuFogang County Center for Disease Control and Prevention, Guangdong, China.
Weirong ZhangBeijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing, China.
Peng XueBeijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing, China.
Jiaping LiuBeijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing, China.
Louise B WeschlerIndependent Researcher, 161 Richdale Road, Colts Neck NJ, USA.
Jingchao XieBeijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing, China. Electronic address: xiejc@bjut.edu.cn.
Yuguo LiDepartment of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong; School of Public Health, The University of Hong Kong, Pokfulam Road, Hong Kong. Electronic address: liyg@hku.hk.
Min KangGuangdong Provincial Center for Disease Control and Prevention, Guangdong province, China; School of Public Health, Southern Medical University, Guangzhou, China. Electronic address: kangmin@cdcp.org.cn.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCoronavirus disease 2019 (COVID-19) is primarily a respiratory disease that has become a global pandemic. Close contact plays an important role in infection spread, while fomite may also be a possible transmission route. Research during the COVID-19 pandemic has identified long-range airborne transmission as one of the important transmission routes although lack solid evidence.

methodsWe examined video data related to a restaurant associated COVID-19 outbreak in Guangzhou. We observed more than 40,000 surface touches and 13,000 episodes of close contacts in the restaurant during the entire lunch duration. These data allowed us to analyse infection risk via both the fomite and close contact routes.

resultsThere is no significant correlation between the infection risk via both fomite and close contact routes among those who were not family members of the index case. We can thus rule out virus transmission via fomite contact and interpersonal close contact routes in the Guangzhou restaurant outbreak. The absence of a fomite route agrees with the COVID-19 literature.

conclusionsThese results provide indirect evidence for the long-range airborne route dominating SARS-CoV-2 transmission in the restaurant. We note that the restaurant was poorly ventilated, allowing for increasing airborne SARS-CoV-2 concentration.

Indexed as

COVID-19PandemicsDisease OutbreaksHumansRestaurantsSARS-CoV-2TouchAirborneClose contactCovid-19FomiteHuman behavior

Identifiers

PMID34062182
PMCPMC8164346

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.