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3. The spread of coronavirus outside China. https://www.statista.com/chart/20935/covid-19-coronavirus-cases-outside-china/. Accessed 20 March 2020.
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5. Updated WHO advice for international traffic in relation to the outbreak of the novel coronavirus 2019-nCoV. https://www.who.int/news-room/articles-detail/updated-who-advice-for-international-traffic-in-relation-to-the-outbreak-of-the-novel-coronavirus-2019-ncov-24-jan/. Accessed 20 March 2020.