Cited by 623Infection Control and VentilationDental Research and COVID-19COVID-19 impact on air quality

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Particle sizes of infectious aerosols: implications for infection control

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Fennelly, Kevin P·2020·The Lancet Respiratory Medicine

DOI 10.1016/s2213-2600(20)30323-4PMC PMC7380927

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Abstract

The global pandemic of COVID-19 has been associated with infections and deaths among health-care workers. This Viewpoint of infectious aerosols is intended to inform appropriate infection control measures to protect health-care workers. Studies of cough aerosols and of exhaled breath from patients with various respiratory infections have shown striking similarities in aerosol size distributions, with a predominance of pathogens in small particles (<5 μm). These are immediately respirable, suggesting the need for personal respiratory protection (respirators) for individuals in close proximity to patients with potentially virulent pathogens. There is no evidence that some pathogens are carried only in large droplets. Surgical masks might offer some respiratory protection from inhalation of infectious aerosols, but not as much as respirators. However, surgical masks worn by patients reduce exposures to infectious aerosols to health-care workers and other individuals. The variability of infectious aerosol production, with some so-called super-emitters producing much higher amounts of infectious aerosol than most, might help to explain the epidemiology of super-spreading. Airborne infection control measures are indicated for potentially lethal respiratory pathogens such as severe acute respiratory syndrome coronavirus 2.

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Authors: Fennelly, K. P.
Affiliations: National Institutes of Health (US)
Corresponding author: Fennelly, Kevin P
ORCID: Fennelly, Kevin P
Venue: The Lancet Respiratory Medicine
Publisher: Elsevier BV
Published: 2020-09
Volume: 8
Issue: 9
Pages: 914-924
ISSN: 2213-2600 (ISSN-L)
DOI: 10.1016/s2213-2600(20)30323-4
PMC: PMC7380927
OpenAlex: W3044072752
Cited by: 621
References: 145
Citations by year: 2026: 42 · 2025: 58 · 2024: 83 · 2023: 75 · 2022: 119 · 2021: 185 · 2020: 59
FWCI: 15.48
Type: journal article
Language: en
Open access: bronze
doi.org
Licence: www.elsevier.com/tdm/userlicense/1.0/ (tdm)
www.elsevier.com/legal/tdmrep-license (tdm)
Locations: The Lancet Respiratory Medicine (publishedVersion)
PubMed Central (publishedVersion)
PubMed (publishedVersion)
reponame:Expeditio Repositorio Institucional UJTL
Topics: Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Infection Control and Ventilation
Health Sciences › Dentistry › General Dentistry › Dental Research and COVID-19
Physical Sciences › Environmental Science › Global and Planetary Change › COVID-19 impact on air quality
Keywords: infectious aerosols, aerosol particle size, infection control, healthcare workers, COVID-19 pandemic, SARS-CoV-2, respiratory protection, respirators, surgical masks, cough aerosols, exhaled breath, super-emitters, superspreading, airborne transmission, respiratory pathogens
MeSH terms: Betacoronavirus, COVID-19, SARS-CoV-2, Aerosols, Health Personnel, Humans, Particle Size, Pneumonia, Viral, Infection Control, Infectious Disease Transmission, Patient-to-Professional, Coronavirus Infections, Inhalation Exposure, Pandemics

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