Table 2.

Emerging space-time clusters of COVID-19 from January 22nd-March 27th, 2020 at the county level (RR = relative risk).

Cluster	Duration (days)	p	Observed	Expected	RR	# of counties	# of counties with RR > 1
1	Mar 19th - Mar 27th	<0.001	56,189	3343.8	33.1	14	14
2	Mar 21st - Mar 27th	<0.001	3036	835.8	3.7	3	3
3	Mar 19th - Mar 27th	<0.001	1477	228.0	6.5	2	2
4	Mar 24th - Mar 27th	<0.001	1953	636.4	3.1	1	1
5	Mar 17th - Mar 27th	<0.001	1929	1032.9	1.9	4	4
6	Mar 20th - Mar 27th	<0.001	251	35.3	7.1	5	5
7	Mar 11th - Mar 27th	<0.001	218	30.5	7.2	4	3
8	Mar 13th - Mar 27th	<0.001	3214	2173.1	1.5	273	43
9	Mar 8th - Mar 27th	<0.001	93	4.8	19.1	1	1
10	Mar 25th - Mar 27th	<0.001	323	87.9	3.7	1	1
11	Mar 26th - Mar 27th	<0.001	630	294.0	2.1	3	3
12	Mar 19th - Mar 27th	<0.001	95	11.6	8.2	1	1
13	Mar 23rd - Mar 27th	<0.001	49	3.8	12.8	1	1
14	Mar 25th - Mar 27th	<0.001	100	22.2	4.5	1	1
15	Mar 20th - Mar 27th	<0.001	98	26.1	3.7	1	1
16	Mar 21st - Mar 27th	<0.001	63	14.1	4.5	1	1
17	Mar 26th - Mar 27th	<0.001	294	189.7	1.5	14	11
18	Mar 26th - Mar 27th	<0.001	44	12.5	3.5	8	4
19	Mar 26th - Mar 27th	<0.001	146	79.8	1.8	2	2
20	Mar 26th - Mar 27th	<0.001	175	101.5	1.7	2	2
21	Mar 24th - Mar 27th	<0.001	205	127.2	1.6	4	3
22	Mar 25th - Mar 27th	<0.001	198	125.8	1.5	3	3
23	Mar 23rd - Mar 27th	0.003	18	3.4	5.3	1	1
24	Mar 25th - Mar 27th	0.003	143	86.4	1.6	3	3
25	Mar 26th - Mar 27th	0.004	48	19.1	2.5	8	5
26	Mar 23rd - Mar 27th	0.019	21	5.1	4.1	1	1