Journal
NATURE
Volume 585, Issue 7825, Pages 410-+Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41586-020-2293-x
Keywords
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Categories
Funding
- Bill and Melinda Gates Foundation [OPP1134076, OPP1195154, OPP1106427, OPP1032350, OPP1094793]
- European Union Horizon 2020 [MOOD 874850]
- National Natural Science Fund of China [81773498]
- National Science and Technology Major Project of China [2016ZX10004222-009]
- Clinton Health Access Initiative
- UK Department for International Development (DFID)
- Wellcome Trust [106866/Z/15/Z, 204613/Z/16/Z]
- National Natural Science Fund for Distinguished Young Scholars of China [81525023]
- Program of Shanghai Academic/Technology Research Leader [18XD1400300]
- National Science Foundation, USA [1816075]
- Bill and Melinda Gates Foundation [OPP1195154] Funding Source: Bill and Melinda Gates Foundation
- Division Of Mathematical Sciences
- Direct For Mathematical & Physical Scien [1816075] Funding Source: National Science Foundation
Ask authors/readers for more resources
On 11 March 2020, the World Health Organization (WHO) declared coronavirus disease 2019 (COVID-19) a pandemic(1). The strategies based on non-pharmaceutical interventions that were used to contain the outbreak in China appear to be effective(2), but quantitative research is still needed to assess the efficacy of non-pharmaceutical interventions and their timings(3). Here, using epidemiological data on COVID-19 and anonymized data on human movement(4,5), we develop a modelling framework that uses daily travel networks to simulate different outbreak and intervention scenarios across China. We estimate that there were a total of 114,325 cases of COVID-19 (interquartile range 76,776-164,576) in mainland China as of 29 February 2020. Without non-pharmaceutical interventions, we predict that the number of cases would have been 67-fold higher (interquartile range 44-94-fold) by 29 February 2020, and we find that the effectiveness of different interventions varied. We estimate that early detection and isolation of cases prevented more infections than did travel restrictions and contact reductions, but that a combination of non-pharmaceutical interventions achieved the strongest and most rapid effect. According to our model, the lifting of travel restrictions from 17 February 2020 does not lead to an increase in cases across China if social distancing interventions can be maintained, even at a limited level of an on average 25% reduction in contact between individuals that continues until late April. These findings improve our understanding of the effects of non-pharmaceutical interventions on COVID-19, and will inform response efforts across the world. A model of the effects of different non-pharmaceutical interventions on the spread of COVID-19 in China suggests that a strategy involving the rapid implementation of a combination of interventions is most effective.
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