Evidence map›Paper›PMID 33119733›Full record

SynthesisClinical infectious diseases : an official publication of the Infectious Diseases Society of America2021

Dose-response Relation Deduced for Coronaviruses From Coronavirus Disease 2019, Severe Acute Respiratory Syndrome, and Middle East Respiratory Syndrome: Meta-analysis Results and its Application for Infection Risk Assessment of Aerosol Transmission.

Xiaole Zhang, Jing Wang

Registry-linked trialOpen access · hybridAbstract readMeta-Analysis
In one paragraph

Synthesis in Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04823351 (Randomized Controlled Trial to Compare Clinical Efficacy of Surgical and Filtering Facepiece 2 Masks for Care Home Workers Treating COVID-19 Patients), which is not on this map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
6.6field-weighted citation impact, top 2% 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.

NCT04823351 naunknown statusnot on this map

Randomized Controlled Trial to Compare Clinical Efficacy of Surgical and Filtering Facepiece 2 Masks for Care Home Workers Treating COVID-19 Patients

TypeinterventionalSponsorUniversity of ZurichRan2021 to 2021Enrolled1,200ConditionsCovid19ArmsSurgical Mask
3 · Its place in the literature

Who cites it

27 citing papers in PubMed, 69 citations in OpenAlex.

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  11. Pandemic management requires exposure science.Environment international · 2022
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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

2 authors at 1 institution in 1 country.

Xiaole ZhangInstitute of Environmental Engineering, Department of Civil, Environmental and Geomatics Engineering, Swiss Federal Institute of Technology Zürich (ETH Zürich), Zürich, Switzerland.
Jing WangInstitute of Environmental Engineering, Department of Civil, Environmental and Geomatics Engineering, Swiss Federal Institute of Technology Zürich (ETH Zürich), Zürich, Switzerland.ORCID 0000-0003-2078-137X
ETH Zurich · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundA comprehensive understanding of the transmission routes of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is of great importance to effectively control the spread of coronavirus disease 2019 (COVID-19). However, the fundamental dose-response relation is missing for evaluation of the infection risk.

methodsWe developed a simple framework to integrate the a priori dose-response relation for SARS-CoV-2 based on mice experiments, the recent data on infection risk from a meta-analysis, and respiratory virus shedding in exhaled breath to shed light on the dose-response relation for humans. The aerosol transmission infection risk was evaluated based on the dose-response model for a typical indoor environment.

resultsThe developed dose-response relation is an exponential function with a constant k in the range of about 6.4 × 104 to 9.8 × 105 virus copies, which means that the infection risk caused by 1 virus copy in viral shedding is on the order of 10-6 to 10-5. The median infection risk via aerosol transmission with 1-hour exposure (10-6 to 10-4) was significantly lower than the risk caused by close contact (10-1) in a room with an area of 10 to 400 m2 with 1 infected individual in it and with a typical ventilation rate of 1 air change per hour.

conclusionsThe infection risk caused by aerosol transmission was significantly lower than the risk caused by close contact. It is still necessary to be cautious for the potential aerosol transmission risk in small rooms with prolonged exposure duration.

Indexed as

COVID-19Middle East Respiratory Syndrome CoronavirusAerosolsAnimalsHumansMiceRisk AssessmentSARS-CoV-2AerosolsCOVID-19dose-response relationinfection riskquantitative microbial risk assessmentSARS-CoV-2

Identifiers

PMID33119733
PMCPMC7665418
OpenAlexW3097122381

What OpenQuestion holds

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LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

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.