The effectiveness of travel restriction measures in alleviating the COVID-19 epidemic: evidence from Shenzhen, China.

Three major conclusions are as follows: (1) at the initial outbreak stage, the correlation of population mobility from different regions into Shenzhen and the spread of COVID-19 presents a positive trend; (2) during the outbreak and peak periods, China’s national travel ban policy achieved unprecedented effectiveness, and the correlation shows a significant decrease tendency; (3) in the containment period, the correlation no longer shows a clear positive trend, the national restrictions can be appropriately liberalized and appropriate economic recovery policies can be adopted properly, but attention still needs to be paid to large-scale mobility domestically and especially internationally in the long run, especially for high-risk areas.

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With the restrictions of population mobility and other social distancing policies enacted across the country, the number of confirmed cases has shown a decreasing trend, which may indicate that these combined measures have curbed the rapid spread of the epidemic to a certain extent.

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