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Timing of exported infected cases.. A. Cumulative total of exported infected cases by confirmation date by WHO. B. Using case reports of individuals infected with coronavirus in Japan, Singapore, and Korea, a graph of the number of exported cases is plotted to the flight date into the country. Evacuees are excluded from this graph.
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Fig 1B shows the flight dates of infected cases exported into each country, highlighting the period from January 19th to 22nd, 2020 having the highest number of exported cases, corresponding to the four days before the travel ban. Thailand, which has the most travelers from Wuhan, is a significant outlier among countries with multiple exported cases (S2 and S3 Figs in S1 File). This may be explained by the fact that most travelers from Wuhan to Thailand were tourists, and this population may not remain in Thailand even if they were infected.
Exported infected cases and risky travelers.. The number of confirmed exported cases were plotted against the number of estimated risky travelers from Wuhan from January 19th to 22nd, 2020. A line of best fit was used for countries besides Thailand. Infected evacuees were excluded from the exported infected cases.
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Thailand (Fig 2).
Infected cases among evacuees of each country.
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We also compiled information about infected cases among evacuees of Wuhan (Fig 3).