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. 2020 Apr 14;12(4):e7668. doi: 10.7759/cureus.7668

Figure 1. Number of daily alighting passengers for all stations in the Seoul Metropolitan Subway and number of new COVID-19 cases in Seoul and South Korea.

Figure 1

The number of subway passengers in 2019 was shifted forward by one day to match the days of the week

Red bars represent the weekend; the wider bar between January 24 and January 27 represents the Lunar New Year period