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. 2021 Mar 25;2021(3):CD013717. doi: 10.1002/14651858.CD013717.pub2

Zhong 2020.

Study characteristics
Study design Mathematical modelling study
Disease COVID‐19
Travel‐related control measure(s) Border closure and international travel restrictions
  • Radical travel restrictions of different levels (i.e. entry ban, global travel ban, and lockdown)


Date of implementation: 21 January  ‐ 04 April 2020
Country implementing the measure(s) Country protected by the measure: multiple countries (249 geographic areas)
Country restricted by the measure: n.r.
Outcome(s) Cases avoided due to the measure
  • Outcome 1: number of cumulative cases in community

  • Outcome 2: days to epidemic arrival

    • Follow‐up: 21 January  ‐ 4 April 2020

Notes COI: “The authors declare that they have no competing financial interests.”
Funding: “This work was supported in part by the Department of Mechanical Aerospace and Nuclear Engineering Department at Rensselaer Polytechnic Institute, Troy, NY.”

CDC: Centers for Disease Control and Prevention; COI: conflicts of interest; COVID‐19: coronavirus disease 2019; EU: European Union; MERS: Middle East respiratory syndrome; NPI: non‐pharmaceutical intervention;n.r.: not reported;PCR: polymerase chain reaction; R(T): current reproduction number; RT‐PCR: reverse transcription polymerase chain reaction; SARS: severe acute respiratory syndrome; SEIR: susceptible, exposed, infectious, recovered; WHO: World Health Organization