Table.

Origin of subsequently clustered cases by origin of index case and border proximity, United States, 2005–2010

	Other foreign-born				Mexico-born				US-born Hispanic				US-born non-Hispanic
		Border states				Border states				Border states				Border states
	Non- border states	Non- border states	Border areas	All areas	Non- border states	Non- border areas	Border areas	All areas	Non- border states	Non- border areas	Border areas	All areas	Non- border states	Non- border areas	Border areas	All areas
Index cases, n*	212	89	8	309	50	44	26	120	18	29	22	69	259	69	5	333
Subsequent cases, n	414	243	22	679	81	117	61	259	40	131	55	226	623	253	9	885
Origin of subsequent cases, col %
Other foreign-born	70.5	77.0	86.4	73.3	12.3	2.6	3.3	5.8	15.0	3.8	0.0	4.9	8.5	8.7	0.0	8.5
Mexico-born	5.1	6.6	4.5	5.6	48.1	56.4	62.3	55.2	22.5	19.8	56.4	29.2	2.2	11.1	55.6	5.3
US-born Hispanic	5.6	2.5	4.5	4.4	16.0	22.2	24.6	20.8	25.0	35.1	34.5	33.2	2.4	7.5	22.2	4.1
US-born non-Hispanic	18.8	14.0	4.5	16.6	23.5	18.8	9.8	18.1	37.5	41.2	9.1	32.7	86.8	72.7	22.2	82.1

^*The number of index cases is equivalent to the number of clusters.