Figure 6
Effective reproduction number map of Tokyo metropolitan area (a) 2 months before 1st SoE, (b) during 1st SoE, (c) 2 months before 2nd SoE, and (d) during 2nd SoE. The Yamanote line is indicated by a bold grey closed curve, and other railways are indicated by fine grey curves. The colour represents the values on a log-10 scale. The sum of all regions is the overall effective reproduction number. High-risk zones are concentrated around Tokyo station and the Yamanote line. The maps are generated by Generic Mapping Tools (GMT) 6.0.049 (https://www.generic-mapping-tools.org/).
