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. 2023 Feb 22;52:102556. doi: 10.1016/j.tmaid.2023.102556

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© 2023 The Authors

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Fig. 1 — The proportion and cumulative duration of international travel restrictions in 2020–2021. Daily proportion of global border policy implementation (a); Country-specific cumulative duration in maintaining screening (b), quarantine (c), ban on regions (d) and total border closure (e). “No measures” represented no restrictions on international travel (level-0); “Data unavailable” indicated regions with no records of the specific policy implementation; Administrative boundaries were adapted from the database of Global Administrative Areas (GADM).