Number of neuroinvasive and non-neuroinvasive cases of West Nile Virus
Disease in the US, 1999 - 2008
Source: Centers for Disease Control and Prevention, www.cdc.gov
Year     inv   non-inv
1999      59         3
2000      19         2
2001      64         2
2002    2946      1210
2003    2866      6996
2004    1148      1391
2005    1309      1691
2006    1495      2774
2007    1227       117
2008     689       667
1999    59  3
2000    19  2
2001    64  2
2002    2946    1210
2003    2866    6996
2004    1148    1391
2005    1309    1691
2006    1495    2774
2007    1227    117
2008    689 667