Evidence map›Paper›PMID 34910996›Full record

ArticleJournal of hazardous materials2022

Predominant airborne transmission and insignificant fomite transmission of SARS-CoV-2 in a two-bus COVID-19 outbreak originating from the same pre-symptomatic index case.

Pan Cheng, Kaiwei Luo, Shenglan Xiao, Hongyu Yang, Jian Hang, Cuiyun Ou, Benjamin J Cowling, Hui-Ling Yen, David Sc Hui, Shixiong Hu and 1 more

Abstract read
In one paragraph

Article in Journal of hazardous materials, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
–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

23 citing papers in PubMed.

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  17. Pathogens (Basel, Switzerland) · 2022
    Review
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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

11 authors.

Pan ChengDepartment of Mechanical Engineering, The University of Hong Kong, Hong Kong, China.
Kaiwei LuoHunan Provincial Center for Disease Control and Prevention, Changsha, China.
Shenglan XiaoDepartment of Mechanical Engineering, The University of Hong Kong, Hong Kong, China; School of Public Health, Sun Yat-sen University, Guangzhou, China.
Hongyu YangSchool of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China.
Jian HangSchool of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China.
Cuiyun OuSchool of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China.
Benjamin J CowlingSchool of Public Health, The University of Hong Kong, Hong Kong, China.
Hui-Ling YenSchool of Public Health, The University of Hong Kong, Hong Kong, China.
David Sc HuiDepartment of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong, China.
Shixiong HuHunan Provincial Center for Disease Control and Prevention, Changsha, China.
Yuguo LiDepartment of Mechanical Engineering, The University of Hong Kong, Hong Kong, China; School of Public Health, The University of Hong Kong, Hong Kong, China. Electronic address: liyg@hku.hk.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The number of people infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) continues to increase worldwide, but despite extensive research, there remains significant uncertainty about the predominant routes of SARS-CoV-2 transmission. We conducted a mechanistic modeling and calculated the exposure dose and infection risk of each passenger in a two-bus COVID-19 outbreak in Hunan province, China. This outbreak originated from a single pre-symptomatic index case. Some human behavioral data related to exposure including boarding and alighting time of some passengers and seating position and mask wearing of all passengers were obtained from the available closed-circuit television images/clips and/or questionnaire survey. Least-squares fitting was performed to explore the effect of effective viral load on transmission risk, and the most likely quanta generation rate was also estimated. This study reveals the leading role of airborne SARS-CoV-2 transmission and negligible role of fomite transmission in a poorly ventilated indoor environment, highlighting the need for more targeted interventions in such environments. The quanta generation rate of the index case differed by a factor of 1.8 on the two buses and transmission occurred in the afternoon of the same day, indicating a time-varying effective viral load within a short period of five hours.

Indexed as

Air MicrobiologyCOVID-19Motor VehiclesSARS-CoV-2Disease OutbreaksFomitesHumansAirborne transmissionCOVID-19Fomite transmissionQuanta generation rate

Identifiers

PMID34910996
PMCPMC8656245

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.