Table 2 Composition of 11 populations combined with the structure and geographical location data

Cluster 1

H1_HB-S

Hebei

Handan

11

30

2020–05-28–2020–06-10

Xingtai

8

Tangshan

7

Hengshui

2

Baoding

2

Cluster 2

H2_HB-N

Hebei

Tangshan

20

25

2020–06-01–2020–06-11

Qinhuangdao

2

Xingtai

2

Cangzhou

1

Cluster 1

H3_BJ

Beijing

Beijing

19

19

2020–06-06–2020–06-08

Cluster 1

H4_HN

Henan

Xinxiang

11

22

2020–05-01–2020–05-22

Zhoukou

6

Puyang

5

Cluster 1

H5_SD

Shandong

Tai'an

26

43

2020–05-13–2020–05-23

Linyi

17

Cluster 2

H6_JS-N

North Jiangsu

Lianyungang

51

59

2020–05-12–2020–05-20

Xuzhou

8

Cluster 3

H7_JS

Jiangsu

Xuzhou

13

63

2020–05-12–2020–05-20

Lianyungang

4

Zhenjiang

16

2020–04-21–2020–04-24

Jurong

11

Yangzhou

9

Yancheng

8

Nanjing

2

Cluster 1

H8_JS-S

South Jiangsu

Yangzhou

15

20

2020–04-10

Zhenjiang

5

Cluster 3

H9_AH

Anhui

Hefei

11

31

2020–04-02–2020–05-08

Wuhu

10

Huai' an

5

Bengbu

4

Tongling

1

Cluster 3

H10_ZJ-N1

North Zhejiang

Jiaxing

32

48

2020–04-21

Hangzhou

16

Cluster 2

H11_ZJ-N2

North Zhejiang

Hangzhou

12

12

2020–04-21

Total

372