COVID-19 transmission in Hong Kong despite universal masking
Copyright © 2021 Elsevier Ltd. All rights reserved..
OBJECTIVES: mask-wearing outside the home has been almost universal in Hong Kong since late January 2020 with very high compliance. Nevertheless, community spread of COVID-19 has still occurred. We aimed to assess the settings where COVID-19 transmission occurred and determine the fraction of transmission events that occurred in settings where masks are not usually worn.
METHODS: we reviewed detailed information provided by the Hong Kong Department of Health on local COVID-19 cases diagnosed up to 30 September 2020 to determine the most likely settings in which transmission occurred. We classified them in probably mask-on or mask-of and compared the prevalence of asymptomatic infections in these settings.
RESULTS: among the 2425 cases (65.3%, 2425/3711) with information on transmission setting, 77.6% of the transmission occurred in household and social settings where face masks are not usually worn. Infections that occurred in mask-on settings were more likely to be asymptomatic (adjusted odds ratio 1.33; 95% confidence interval: 1.04, 1.68).
CONCLUSIONS: we conclude that universal mask-wearing can reduce transmission, but transmission can continue to occur in settings where face masks are not usually worn. The higher proportion of asymptomatic cases in mask-on settings could be related to a milder disease presentation or earlier case detection.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:83 |
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| Enthalten in: |
The Journal of infection - 83(2021), 1 vom: 01. Juli, Seite 92-95 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Martín-Sánchez, Mario [VerfasserIn] |
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| Links: |
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| Themen: |
COVID-19 |
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| Anmerkungen: |
Date Completed 24.06.2021 Date Revised 14.07.2021 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.jinf.2021.04.019 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM324487894 |
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| 100 | 1 | |a Martín-Sánchez, Mario |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a COVID-19 transmission in Hong Kong despite universal masking |
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| 500 | |a Date Completed 24.06.2021 | ||
| 500 | |a Date Revised 14.07.2021 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2021 Elsevier Ltd. All rights reserved. | ||
| 520 | |a OBJECTIVES: mask-wearing outside the home has been almost universal in Hong Kong since late January 2020 with very high compliance. Nevertheless, community spread of COVID-19 has still occurred. We aimed to assess the settings where COVID-19 transmission occurred and determine the fraction of transmission events that occurred in settings where masks are not usually worn | ||
| 520 | |a METHODS: we reviewed detailed information provided by the Hong Kong Department of Health on local COVID-19 cases diagnosed up to 30 September 2020 to determine the most likely settings in which transmission occurred. We classified them in probably mask-on or mask-of and compared the prevalence of asymptomatic infections in these settings | ||
| 520 | |a RESULTS: among the 2425 cases (65.3%, 2425/3711) with information on transmission setting, 77.6% of the transmission occurred in household and social settings where face masks are not usually worn. Infections that occurred in mask-on settings were more likely to be asymptomatic (adjusted odds ratio 1.33; 95% confidence interval: 1.04, 1.68) | ||
| 520 | |a CONCLUSIONS: we conclude that universal mask-wearing can reduce transmission, but transmission can continue to occur in settings where face masks are not usually worn. The higher proportion of asymptomatic cases in mask-on settings could be related to a milder disease presentation or earlier case detection | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a COVID-19 | |
| 650 | 4 | |a Epidemiology | |
| 650 | 4 | |a Face masks | |
| 650 | 4 | |a Public health | |
| 650 | 4 | |a SARS-CoV-2 | |
| 650 | 4 | |a Transmission | |
| 700 | 1 | |a Lim, Wey Wen |e verfasserin |4 aut | |
| 700 | 1 | |a Yeung, Amy |e verfasserin |4 aut | |
| 700 | 1 | |a Adam, Dillon C |e verfasserin |4 aut | |
| 700 | 1 | |a Ali, Sheikh Taslim |e verfasserin |4 aut | |
| 700 | 1 | |a Lau, Eric H Y |e verfasserin |4 aut | |
| 700 | 1 | |a Wu, Peng |e verfasserin |4 aut | |
| 700 | 1 | |a Yuen, Kwok-Yung |e verfasserin |4 aut | |
| 700 | 1 | |a Leung, Gabriel M |e verfasserin |4 aut | |
| 700 | 1 | |a Cowling, Benjamin J |e verfasserin |4 aut | |
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