Table I.

Human cases of WNV infections¹ reported in the USA and Canada.

Year	USA		Canada3
	Human cases	Deaths	Human cases	Deaths
1999	62	7	-	-
2000	21	2	-	-
2001	66	10	-	-
2002	4,156	284	414	14
2003	9,862	264	1,481	14
2004	2,539	100	25	-
2005	3,000	119	225	10
2006	4,269	177	151	-
2007	3,630	124	2,215	-
2008	1,356	44	36	-
2009	720	32	13	-
2010	1,021	57	4	-
2011	712	43	102	-
2012	5,387	243	450	6
Total	33,804	1,506	5,099	44
Ratio4 ×10,000	1.13	0.05	1.55	0.01

¹Including neuroinvasive disease (such as meningitis or encephalitis) and non-neuroinvasive disease (WN fever);

²source: CDC, accessed on 11/12/2012 (http://www.cdc.gov/ncidod/dvbid/westnile/surv&controlCaseCount12_detailed.htm);

³source: Public Health Agency of Canada, accessed on 27/10/2012 (http://www.phac-aspc.gc.ca) and Community and Hospital Infection Control Association - Canada, accessed on 29/04/2011 at: http://www.chica.org/links_wnv.php;

⁴mean values of the population in USA (297,013,100) and Canada (32,887,690) in the reported years. Source: http://www.indexmundi.com/.