Fig. 6From: COVID-19 pandemic vaccination strategies of early 2021 based on behavioral differences between residents of Tokyo and Osaka, JapanNumber of people at major train stations during 20:00 – 24:00 compared to 2019. a Shibuya and Shinjuku stations in Tokyo, and Osaka and Namba stations in Osaka. b Correlation between number of people and number of infected people during expansion of the fourth wave. The u20 denotes under 20 years of age and the o60 denotes over 60 years of ageBack to article page