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Assessing the Impact of Reduced Travel on Exportation Dynamics of Novel Coronavirus Infection (COVID-19)
Asami Anzai
Tetsuro Kobayashi
Natalie M. Linton
Ryo Kinoshita
Katsuma Hayashi
Ayako Suzuki
Yichi Yang
Sung-mok Jung
Takeshi Miyama
Andrei R. Akhmetzhanov
Hiroshi Nishiura
Acceso Abierto
Infectious diseases
The impact of the drastic reduction in travel volume within mainland China in January and February 2020 was quantified with respect to reports of novel coronavirus (COVID-19) infection outside China. Data on confirmed cases diagnosed outside China were analyzed using statistical models to estimate the impact of travel reduction on three epidemiological outcome measures: the number of exported cases, the probability of a major epidemic, and the time delay to a major epidemic. From 28 January to 7 February 2020, we estimated that 226 exported cases (95% confidence interval: 86,449) were prevented, corresponding to a 70.4% reduction in incidence compared to the counterfactual scenario. The reduced probability of a major epidemic ranged from 7% to 20% in Japan, which resulted in a median time delay to a major epidemic of two days. Depending on the scenario, the estimated delay may be less than one day. As the delay is small, the decision to control travel volume through restrictions on freedom of movement should be balanced between the resulting estimated epidemiological impact and predicted economic fallout.
Journal of Clinical Medicine
Epidemia COVID-19
Versión publicada
publishedVersion - Versión publicada
Appears in Collections:Artículos científicos

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