Effectiveness of Face Masks in Preventing Airborne Transmission of SARS-CoV-2

ABSTRACT Guidelines from the CDC and the WHO recommend the wearing of face masks to prevent the spread of coronavirus (CoV) disease 2019 (COVID-19); however, the protective efficiency of such masks against airborne transmission of infectious severe acute respiratory syndrome CoV-2 (SARS-CoV-2) dropl...

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Autores principales:	Hiroshi Ueki, Yuri Furusawa, Kiyoko Iwatsuki-Horimoto, Masaki Imai, Hiroki Kabata, Hidekazu Nishimura, Yoshihiro Kawaoka
Formato:	article
Lenguaje:	EN
Publicado:	American Society for Microbiology 2020
Materias:	COVID-19 N95 masks SARS-CoV-2 aerosols droplets face masks Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/a36e3c48036147da8338a3573ac79dea
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spelling	oai:doaj.org-article:a36e3c48036147da8338a3573ac79dea2021-11-15T15:30:59ZEffectiveness of Face Masks in Preventing Airborne Transmission of SARS-CoV-210.1128/mSphere.00637-202379-5042https://doaj.org/article/a36e3c48036147da8338a3573ac79dea2020-10-01T00:00:00Zhttps://journals.asm.org/doi/10.1128/mSphere.00637-20https://doaj.org/toc/2379-5042ABSTRACT Guidelines from the CDC and the WHO recommend the wearing of face masks to prevent the spread of coronavirus (CoV) disease 2019 (COVID-19); however, the protective efficiency of such masks against airborne transmission of infectious severe acute respiratory syndrome CoV-2 (SARS-CoV-2) droplets/aerosols is unknown. Here, we developed an airborne transmission simulator of infectious SARS-CoV-2-containing droplets/aerosols produced by human respiration and coughs and assessed the transmissibility of the infectious droplets/aerosols and the ability of various types of face masks to block the transmission. We found that cotton masks, surgical masks, and N95 masks all have a protective effect with respect to the transmission of infective droplets/aerosols of SARS-CoV-2 and that the protective efficiency was higher when masks were worn by a virus spreader. Importantly, medical masks (surgical masks and even N95 masks) were not able to completely block the transmission of virus droplets/aerosols even when completely sealed. Our data will help medical workers understand the proper use and performance of masks and determine whether they need additional equipment to protect themselves from infected patients. IMPORTANCE Airborne simulation experiments showed that cotton masks, surgical masks, and N95 masks provide some protection from the transmission of infective SARS-CoV-2 droplets/aerosols; however, medical masks (surgical masks and even N95 masks) could not completely block the transmission of virus droplets/aerosols even when sealed.Hiroshi UekiYuri FurusawaKiyoko Iwatsuki-HorimotoMasaki ImaiHiroki KabataHidekazu NishimuraYoshihiro KawaokaAmerican Society for MicrobiologyarticleCOVID-19N95 masksSARS-CoV-2aerosolsdropletsface masksMicrobiologyQR1-502ENmSphere, Vol 5, Iss 5 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	COVID-19 N95 masks SARS-CoV-2 aerosols droplets face masks Microbiology QR1-502
spellingShingle	COVID-19 N95 masks SARS-CoV-2 aerosols droplets face masks Microbiology QR1-502 Hiroshi Ueki Yuri Furusawa Kiyoko Iwatsuki-Horimoto Masaki Imai Hiroki Kabata Hidekazu Nishimura Yoshihiro Kawaoka Effectiveness of Face Masks in Preventing Airborne Transmission of SARS-CoV-2
description	ABSTRACT Guidelines from the CDC and the WHO recommend the wearing of face masks to prevent the spread of coronavirus (CoV) disease 2019 (COVID-19); however, the protective efficiency of such masks against airborne transmission of infectious severe acute respiratory syndrome CoV-2 (SARS-CoV-2) droplets/aerosols is unknown. Here, we developed an airborne transmission simulator of infectious SARS-CoV-2-containing droplets/aerosols produced by human respiration and coughs and assessed the transmissibility of the infectious droplets/aerosols and the ability of various types of face masks to block the transmission. We found that cotton masks, surgical masks, and N95 masks all have a protective effect with respect to the transmission of infective droplets/aerosols of SARS-CoV-2 and that the protective efficiency was higher when masks were worn by a virus spreader. Importantly, medical masks (surgical masks and even N95 masks) were not able to completely block the transmission of virus droplets/aerosols even when completely sealed. Our data will help medical workers understand the proper use and performance of masks and determine whether they need additional equipment to protect themselves from infected patients. IMPORTANCE Airborne simulation experiments showed that cotton masks, surgical masks, and N95 masks provide some protection from the transmission of infective SARS-CoV-2 droplets/aerosols; however, medical masks (surgical masks and even N95 masks) could not completely block the transmission of virus droplets/aerosols even when sealed.
format	article
author	Hiroshi Ueki Yuri Furusawa Kiyoko Iwatsuki-Horimoto Masaki Imai Hiroki Kabata Hidekazu Nishimura Yoshihiro Kawaoka
author_facet	Hiroshi Ueki Yuri Furusawa Kiyoko Iwatsuki-Horimoto Masaki Imai Hiroki Kabata Hidekazu Nishimura Yoshihiro Kawaoka
author_sort	Hiroshi Ueki
title	Effectiveness of Face Masks in Preventing Airborne Transmission of SARS-CoV-2
title_short	Effectiveness of Face Masks in Preventing Airborne Transmission of SARS-CoV-2
title_full	Effectiveness of Face Masks in Preventing Airborne Transmission of SARS-CoV-2
title_fullStr	Effectiveness of Face Masks in Preventing Airborne Transmission of SARS-CoV-2
title_full_unstemmed	Effectiveness of Face Masks in Preventing Airborne Transmission of SARS-CoV-2
title_sort	effectiveness of face masks in preventing airborne transmission of sars-cov-2
publisher	American Society for Microbiology
publishDate	2020
url	https://doaj.org/article/a36e3c48036147da8338a3573ac79dea
work_keys_str_mv	AT hiroshiueki effectivenessoffacemasksinpreventingairbornetransmissionofsarscov2 AT yurifurusawa effectivenessoffacemasksinpreventingairbornetransmissionofsarscov2 AT kiyokoiwatsukihorimoto effectivenessoffacemasksinpreventingairbornetransmissionofsarscov2 AT masakiimai effectivenessoffacemasksinpreventingairbornetransmissionofsarscov2 AT hirokikabata effectivenessoffacemasksinpreventingairbornetransmissionofsarscov2 AT hidekazunishimura effectivenessoffacemasksinpreventingairbornetransmissionofsarscov2 AT yoshihirokawaoka effectivenessoffacemasksinpreventingairbornetransmissionofsarscov2
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Effectiveness of Face Masks in Preventing Airborne Transmission of SARS-CoV-2

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