Modeling COVID-19 infection risks for a single hand-to-fomite scenario and potential risk reductions offered by surface disinfection

Amanda M. Wilson; Mark H. Weir; Sally F. Bloomfield; Elizabeth A. Scott; Kelly A. Reynolds

doi:10.1016/j.ajic.2020.11.013

Modeling COVID-19 infection risks for a single hand-to-fomite scenario and potential risk reductions offered by surface disinfection

Amanda M. Wilson, Mark H. Weir, Sally F. Bloomfield, Elizabeth A. Scott, Kelly A. Reynolds

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

We used a quantitative microbial risk assessment approach to relate log₁₀ disinfection reductions of SARS-CoV-2 bioburden to COVID-19 infection risks. Under low viral bioburden, minimal log₁₀ reductions may be needed to reduce infection risks for a single hand-to-fomite touch to levels lower than 1:1,000,000, as a risk comparison point. For higher viral bioburden conditions, log₁₀ reductions of more than 2 may be needed to achieve median infection risks of less than 1:1,000,000.

Original language	English (US)
Pages (from-to)	846-848
Number of pages	3
Journal	American Journal of Infection Control
Volume	49
Issue number	6
DOIs	https://doi.org/10.1016/j.ajic.2020.11.013
State	Published - Jun 2021

Keywords

Disinfection
Fomite
QMRA
SARS-CoV-2

ASJC Scopus subject areas

Epidemiology
Health Policy
Public Health, Environmental and Occupational Health
Infectious Diseases

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10.1016/j.ajic.2020.11.013

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title = "Modeling COVID-19 infection risks for a single hand-to-fomite scenario and potential risk reductions offered by surface disinfection",

abstract = "We used a quantitative microbial risk assessment approach to relate log10 disinfection reductions of SARS-CoV-2 bioburden to COVID-19 infection risks. Under low viral bioburden, minimal log10 reductions may be needed to reduce infection risks for a single hand-to-fomite touch to levels lower than 1:1,000,000, as a risk comparison point. For higher viral bioburden conditions, log10 reductions of more than 2 may be needed to achieve median infection risks of less than 1:1,000,000.",

keywords = "Disinfection, Fomite, QMRA, SARS-CoV-2",

author = "Wilson, {Amanda M.} and Weir, {Mark H.} and Bloomfield, {Sally F.} and Scott, {Elizabeth A.} and Reynolds, {Kelly A.}",

note = "Funding Information: A.M. Wilson was supported by the University of Arizona Foundation and the Hispanic Women's Corporation/Zuckerman Family Foundation Student Scholarship Award through the Mel and Enid Zuckerman College of Public Health, University of Arizona. Code is available under a Creative Commons License at: https://github.com/awilson12/QMRA_bleach Publisher Copyright: {\textcopyright} 2020 Association for Professionals in Infection Control and Epidemiology, Inc.",

year = "2021",

month = jun,

doi = "10.1016/j.ajic.2020.11.013",

language = "English (US)",

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AU - Wilson, Amanda M.

AU - Weir, Mark H.

AU - Bloomfield, Sally F.

AU - Scott, Elizabeth A.

AU - Reynolds, Kelly A.

N1 - Funding Information: A.M. Wilson was supported by the University of Arizona Foundation and the Hispanic Women's Corporation/Zuckerman Family Foundation Student Scholarship Award through the Mel and Enid Zuckerman College of Public Health, University of Arizona. Code is available under a Creative Commons License at: https://github.com/awilson12/QMRA_bleach Publisher Copyright: © 2020 Association for Professionals in Infection Control and Epidemiology, Inc.

PY - 2021/6

Y1 - 2021/6

N2 - We used a quantitative microbial risk assessment approach to relate log10 disinfection reductions of SARS-CoV-2 bioburden to COVID-19 infection risks. Under low viral bioburden, minimal log10 reductions may be needed to reduce infection risks for a single hand-to-fomite touch to levels lower than 1:1,000,000, as a risk comparison point. For higher viral bioburden conditions, log10 reductions of more than 2 may be needed to achieve median infection risks of less than 1:1,000,000.

AB - We used a quantitative microbial risk assessment approach to relate log10 disinfection reductions of SARS-CoV-2 bioburden to COVID-19 infection risks. Under low viral bioburden, minimal log10 reductions may be needed to reduce infection risks for a single hand-to-fomite touch to levels lower than 1:1,000,000, as a risk comparison point. For higher viral bioburden conditions, log10 reductions of more than 2 may be needed to achieve median infection risks of less than 1:1,000,000.

KW - Disinfection

KW - Fomite

KW - QMRA

KW - SARS-CoV-2

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JO - American Journal of Infection Control

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Modeling COVID-19 infection risks for a single hand-to-fomite scenario and potential risk reductions offered by surface disinfection

Abstract

Keywords

ASJC Scopus subject areas

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