Fig. 4

Correlation between the migration scale and the confirmed cases between Jan 25 and Feb 15 in blue and brown modules. a Correlation between the migration scale and the cases in blue module (b) Correlation between the migration scale and the in brown module (c) Correlation between the migration scale and the cases in blue module except Chongqing, Wenzhou (ZJ) and Xinyang (HA) (d) Correlation between the migration scale and the cases in the brown module except Shenzhen (GD). Dotted lines represent 90% prediction band