Fig. 2

HCV infection spatiotemporal clusters with high rates identified by SaTScan discrete Poisson method, Shanghai, China, 2005–2018. i) No. communities: number of communities within cluster; ii) Cluster 1 belongs to primary clusters of acute HCV infection; iii) Cluster 2 belongs to primary clusters of chronic HCV infection, and cluster 3, 4 and 5 belong to secondary clusters of chronic HCV infection; iv) Hospital A, B, C, D and E are arranged from top to bottom of the figure