The positive impact of lockdown in Wuhan on containing the COVID-19 outbreak in China
Top Cited Papers
Open Access
- 17 March 2020
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Travel Medicine
- Vol. 27 (3)
- https://doi.org/10.1093/jtm/taaa037
Abstract
With its epicenter in Wuhan, China, the COVID-19 outbreak was declared a public health emergency of international concern (PHEIC) by the World Health Organization (WHO). Consequently, many countries have implemented flight restrictions to China. China itself has imposed a lockdown of the population of Wuhan as well as the entire Hubei province. However, whether these two enormous measures have led to significant changes in the spread of COVID-19 cases remains unclear. We analyzed available data on the development of confirmed domestic and international COVID-19 cases before and after lockdown measures. We evaluated the correlation of domestic air traffic to the number of confirmed COVID-19 cases and determined the growth curves of COVID-19 cases within China before and after lockdown as well as after changes in COVID-19 diagnostic criteria. Our findings indicate a significant increase in doubling time from 2 days (95% Confidence Interval, CI): 1.9–2.6), to 4 days (95% CI: 3.5–4.3), after imposing lockdown. A further increase is detected after changing diagnostic and testing methodology to 19.3 (95% CI: 15.1–26.3), respectively. Moreover, the correlation between domestic air traffic and COVID-19 spread became weaker following lockdown (before lockdown: r = 0.98, p < 0.05 vs. after lockdown: r = 0.91, p = NS). A significantly decreased growth rate and increased doubling time of cases was observed, which is most likely due to Chinese lockdown measures. A more stringent confinement of people in high risk areas seem to have a potential to slow down the spread of COVID-19.Keywords
This publication has 14 references indexed in Scilit:
- Early Transmission Dynamics in Wuhan, China, of Novel Coronavirus–Infected PneumoniaThe New England Journal of Medicine, 2020
- Quantifying the association between domestic travel and the exportation of novel coronavirus (2019-nCoV) cases from Wuhan, China in 2020: a correlational analysisJournal of Travel Medicine, 2020
- Isolation, quarantine, social distancing and community containment: pivotal role for old-style public health measures in the novel coronavirus (2019-nCoV) outbreakJournal of Travel Medicine, 2020
- Nowcasting and forecasting the potential domestic and international spread of the 2019-nCoV outbreak originating in Wuhan, China: a modelling studyThe Lancet, 2020
- Pattern of early human-to-human transmission of Wuhan 2019 novel coronavirus (2019-nCoV), December 2019 to January 2020Eurosurveillance, 2020
- The Evolution of China’s International Aviation Markets from a Policy Perspective on Air Passenger FlowsSustainability, 2019
- Population mobility reductions associated with travel restrictions during the Ebola epidemic in Sierra Leone: use of mobile phone dataInternational Journal of Epidemiology, 2018
- Balancing Individual and Communal Needs: Plague and Public Health in Early Modern SevilleThe SHAFR Guide Online, 2007
- The effect of travel restrictions on the spread of a moderately contagious diseaseBMC Medicine, 2006