Table 1.

Chicago urban classes with WNV human case rates from 2002

Urban Class	Brief Description	Chicago with Land Cover of Illinois				Chicago with National Land Cover Data
		% of tracts	N WNV	Population	WNV per 100 K	% of tracts	N WNV	Population	WNV per 100 K
1	City, Low Income	31.8	99 (15.2%)	1,677,454	5.90	31.9	98 (15.1%)	1,526,551	6.42
2	City, High Income	15.8	25 (3.8%)	894,010	2.80	26.2	132 (20.3)	1,671,026	7.90
3	Inner Suburb	26.2	404 (62.2%)	1,777,327	22.78	26.4	363 (55.8%)	1,895,900	19.15
4	Outer Suburb	19.6	115 (17.6%)	1,819,621	6.32	11.1	50 (7.7%)	1,122,668	4.45
5	Urban No-man's	6.6	7 (1.1%)	112,456	6.22	4.4	7 (1.1%)	64,723	10.82
	OVERALL	100	650 (100.0%)	6,280,868	10.35	100	650 (100.0%)	6,280,868	10.35