Are travel restrictions helpful to control the global COVID-19 outbreak?

Travel Med Infect Dis · 2021 · PMC7946864 · PMID 33716170

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an increasing trendno p-value reported

Correspondingly, there is an increasing trend in the network density and the daily reported confirmed cases began to fluctuate more and become less controllable.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.