Fig. 5

Hot spot analysis of the epidemic (comparison of key dates, local cases). *Spatial autocorrelation analysis of China showed positive spatial correlation. From January 23 to February 20, the epidemic situation was rapidly gathering in space. In part A, there were 39 level 1 hot spots,22 level 2 hot spots. The level 1 hot spots were mainly distributed in Hubei, Hunan, Jiangxi Provinces. The level 2 hot spots were mainly distributed in Henan and Anhui Provinces. In part B, all the original level 2 hot spots turned into level 1. After February 20, the hot spots did not expand, which reflected that the spread of the epidemic was effectively controlled