Volume 26, Number 8—August 2020
Research
Evaluating the Effectiveness of Social Distancing Interventions to Delay or Flatten the Epidemic Curve of Coronavirus Disease
Table
Description of parameters used in the susceptible-exposed-infectious-removed mathematical model for evaluating the effectiveness of social distancing interventions on coronavirus disease*
Parameter | Meaning | Value | Range | Reference |
---|---|---|---|---|
1/σ | Mean latent period | 5.16 days | 4.5–5.8 days | (14) |
1/γ | Mean infectious period | 5.02 days | 3–9 days | † |
β | Transmission coefficient | Calculated | NA | NA |
С | Contact matrix | NA | NA | (19) |
N |
Total population |
3.5 million |
NA |
(13) |
*NA, not applicable. †Q. Bi, unpub. data, https://www.medrxiv.org/content/10.1101/2020.03.03.20028423v3. |
References
- World Health Organization. WHO Director-General’s opening remarks at the media briefing on COVID-19 11 March 2020 [cited 2020 Mar 15]. https://www.who.int/dg/speeches/detail/who-director-general-s-opening-remarks-at-the-media-briefing-on-covid-19---11-march-2020
- Johns Hopkins University and Medicine. Coronavirus resource center. COVID-19 global cases [cited 2020 Apr 2]. https://coronavirus.jhu.edu/map.html
- Snohomoish County Washington. Local declaration of emergency Snohomish County 2020 Mar 4 [cited 2020 Mar 15]. https://snohomishcountywa.gov/CivicAlerts.aspx
- Washington State Department of Health. 2019 novel coronavirus outbreak (COVID-19) [cited 2020 Mar 15]. https://www.doh.wa.gov/emergencies/coronavirus
- Proclamation by the governor: amending proclamations 20–05 and 20–06; 20–07. Washington, USA. 2020 Mar 11 [cited 2020 Mar 15]. https://www.governor.wa.gov/sites/default/files/20-07%20Coronavirus%20%28tmp%29.pdf
- Office of the Governor. Washington State. Inslee announces school closures in King, Snohomish and Pierce counties. 2020 Mar 12 [cited 2020 Mar 15]. https://www.governor.wa.gov/news-media/inslee-announces-school-closures-king-snohomish-and-pierce%C2%A0counties
- Proclamation by the governor: amending proclamations 20–05; 20–25, stay home–stay healthy. Washington, USA. 2020 Mar 23 [cited 2020 Apr 2]. https://www.governor.wa.gov/sites/default/files/proclamations/20-25%20Coronovirus%20Stay%20Safe-Stay%20Healthy%20%28tmp%29%20%28002%29.pdf
- CBS News. Coronavirus updates from March 20, 2020 2020 [cited 2020 Mar 20]. https://www.cbsnews.com/live-updates/coronavirus-disease-covid-19-latest-news-2020-03-20
- Schnirring L. France orders lockdown to slow COVID-19 spread. CIDRAP News 2020 Mar 16. Center for Infectious Disease Research and Policy [cited 2020 Mar 16]. http://www.cidrap.umn.edu/news-perspective/2020/03/france-orders-lockdown-slow-covid-19-spread
- Minder R, Peltier E. Spain, on lockdown, weighs liberties against containing coronavirus. The New York Times. 2020 Mar 15 [cited 2020 Mar 16]. https://www.nytimes.com/2020/03/15/world/europe/spain-coronavirus.html
- United States Census Bureau. Seattle-Tacoma-Bellevue metro area, Washington [cited 2020 Mar 15]. https://data.census.gov/cedsci
- Novel Coronavirus Pneumonia Emergency Response Epidemiology Team. Vital surveillances: the epidemiological characteristics of an outbreak of 2019 novel coronavirus diseases (COVID-19)–China, 2020. China CDC Wkly. 2020;2:113–22 [cited 2020 Mar 15]. http://weekly.chinacdc.cn/en/article/id/e53946e2-c6c4-41e9-9a9b-fea8db1a8f51
- Ferguson NM, Laydon D, Nedjati-Gilani G, Imai N, Ainslie K, Baguelin M, et al. Impact of non-pharmaceutical interventions (NPIs) to reduce COVID-19 mortality and healthcare demand. Imperial College London. 2020 Mar 16 [cited 2020 Mar 17].
- Bedford T. Cryptic transmission of novel coronavirus revealed by genomic epidemiology. Bedford Lab. 2020 Mar 2 [cited 2020 Mar 15]. https://bedford.io/blog
- Office of the Governor. Washington State. Inslee announces statewide shutdown of restaurants, bars and expanded social gathering limits. 2020 Mar 16 [cited 2020 Mar 18]. https://www.governor.wa.gov/news-media/inslee-announces-statewide-shutdown-restaurants-bars-and-expanded-social-gathering-limits
- Ellyat H. No lockdown here: Sweden defends its more relaxed coronavirus strategy. CNBC. 2020 Mar 30 [cited 2020 Apr 2]. https://www.cnbc.com/2020/03/30/sweden-coronavirus-approach-is-very-different-from-the-rest-of-europe.html
- Lempel H, Hammond RA, Epstein JM. Costs of school closure. The Brookings Institution. 2009 Sep 30 [cited 2020 Apr 2]. https://www.brookings.edu/wp-content/uploads/2016/06/0930_school_closure_presentation.pdf
- US Centers for Disease Control and Prevention. Interim pre-pandemic planning guidance: community strategy for pandemic influenza mitigation in the United States: early, targeted, layered use of nonpharmaceutical interventions. Atlanta: The Centers; 2007. https://stacks.cdc.gov/view/cdc/11425
- Hasell J, Ortiz-Ospina E, Mathieu E, Ritchie H, Beltekian D, Roser M. To understand the global pandemic, we need global testing—the Our World in Data COVID-19 Testing dataset, How many tests for COVID-19 are being performed around the world? Our World In Data [cited 2020 Mar 16]. https://ourworldindata.org/covid-testing
- Klein D, Hagedorn B, Kerr C, Hu H, Bedford T, Famulare M, et al. Working paper–model-based estimates of COVID-19 burden in King and Snohomish counties through April 7, 2020 [cited 2020 Mar 16]. https://institutefordiseasemodeling.github.io/COVID-public/reports/Working%20paper%20–%20model-based%20estimates%20of%20COVID-19%20burden%20in%20King%20and%20Snohomish%20counties%20through%20April%207.pdf
- Prem K, Liu Y, Russell TW, Kucharski AJ, Eggo RM, Davies N, et al.; Centre for the Mathematical Modelling of Infectious Diseases COVID-19 Working Group. The effect of control strategies to reduce social mixing on outcomes of the COVID-19 epidemic in Wuhan, China: a modelling study. Lancet Public Health. 2020;
S2468-2667(20)30073-6 ; [Epub ahead of print].PubMed - World Health Organization. WHO Director-General’s opening remarks at the media briefing on COVID-19–16 March 2020 [cited 2020 Mar 18]. https://www.who.int/dg/speeches/detail/who-director-general-s-opening-remarks-at-the-media-briefing-on-covid-19---16-march-2020
- Flaxman S, Mishra S, Gandy A, Unwin HJT, Coupland H, Mellan TA, et al. Imperial College COVID-19 Response Team. Report 13: estimating the number of infections and the impact of non-pharmaceutical interventions on COVID-19 in 11 European countries. 2020 Mar 30. [cited 2020 Mar 20]. https://www.imperial.ac.uk/media/imperial-college/medicine/sph/ide/gida-fellowships/Imperial-College-COVID19-Europe-estimates-and-NPI-impact-30-03-2020.pdf
- Tuite AR, Fisman DN, Greer AL. Mathematical modelling of COVID-19 transmission and mitigation strategies in the population of Ontario, Canada. CMAJ. 2020 Apr 8 [Epub ahead of print].
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