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Final Cumulative Maps & Data for 1999–2016

West Nile virus disease cases reported to CDC by state of residence, 1999-2016

State 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 Total
Alabama 0 0 2 49 37 16 10 8 24 18 0 3 5 62 9 2 9 19 273
Alaska 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Arizona 0 0 0 0 13 391 113 150 97 114 20 167 69 133 62 107 103 78 1,617
Arkansas 0 0 0 43 25 28 28 29 20 9 6 7 1 64 18 11 18 9 316
California 0 0 0 1 3 779 880 278 380 445 112 111 158 479 379 801 783 442 6,031
Colorado 0 0 0 14 2,947 291 106 345 576 71 103 81 7 131 322 118 101 149 5,362
Connecticut 0 1 6 17 17 1 6 9 4 8 0 11 9 21 4 6 10 1 131
Delaware 0 0 0 1 17 0 2 0 1 1 0 0 1 9 3 0 6 0 41
Dist. of Columbia 0 0 0 34 3 2 5 2 0 8 2 6 15 10 1 3 5 1 97
Florida 0 0 12 28 94 41 21 3 3 3 3 12 24 73 7 17 13 8 362
Georgia 0 0 6 44 50 21 20 8 50 8 4 13 22 99 10 13 15 6 389
Hawaii 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1
Idaho 0 0 0 0 1 3 13 996 132 39 38 1 3 17 40 19 13 9 1,324
Illinois 0 0 0 884 54 60 252 215 101 20 5 61 34 290 117 44 77 154 2,368
Indiana 0 0 0 293 47 13 23 80 24 4 4 13 9 77 23 10 21 18 659
Iowa 0 0 0 54 147 23 37 37 30 6 5 9 9 31 44 15 14 37 498
Kansas 0 0 0 22 91 43 25 30 40 31 13 19 4 56 91 54 34 37 590
Kentucky 0 0 0 75 14 7 5 6 4 3 3 3 5 23 3 1 2 8 162
Louisiana 0 0 1 329 124 109 171 180 40 49 21 27 10 335 54 125 5 59 1,639
Maine 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 2
Maryland 0 0 6 36 73 16 5 11 10 14 1 23 19 47 16 6 45 6 334
Massachusetts 0 0 3 23 17 0 6 3 6 1 0 7 6 33 8 6 10 17 146
Michigan 0 0 0 614 19 16 62 55 17 17 1 29 34 202 36 1 18 43 1,164
Minnesota 0 0 0 48 148 34 45 65 101 10 4 8 2 70 79 21 9 83 727
Mississippi 0 0 0 192 87 51 70 183 136 65 53 8 52 247 45 43 38 43 1,313
Missouri 0 0 0 168 64 36 30 62 77 15 5 3 10 20 29 13 29 11 572
Montana 0 0 0 2 222 6 25 34 202 5 5 0 1 6 38 5 3 6 560
Nebraska 0 0 0 152 1,942 53 188 264 163 47 52 39 29 193 226 142 68 95 3,653
Nevada 0 0 0 0 2 44 31 124 12 16 12 2 16 9 11 3 7 16 305
New Hampshire 0 0 0 0 3 0 0 0 0 0 0 1 0 1 1 0 0 0 6
New Jersey 0 6 12 24 34 1 6 5 1 10 3 30 7 48 12 8 26 11 244
New Mexico 0 0 0 0 209 88 33 8 60 8 8 25 4 47 38 24 14 6 572
New York 62 14 15 82 71 10 38 24 22 46 7 128 44 107 32 26 57 22 807
North Carolina 0 0 0 2 24 3 4 1 8 3 0 0 2 7 3 0 4 2 63
North Dakota 0 0 0 17 617 20 86 137 369 37 1 9 4 89 125 23 23 85 1,642
Ohio 0 0 0 441 108 12 61 48 23 15 2 5 21 121 24 11 35 17 944
Oklahoma 0 0 0 21 79 22 31 48 107 9 10 1 1 191 89 18 89 35 751
Oregon 0 0 0 0 0 3 7 69 26 16 11 0 0 11 16 8 1 4 172
Pennsylvania 0 0 3 62 237 15 25 9 10 14 0 28 6 60 11 13 30 16 539
Puerto Rico 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1
Rhode Island 0 0 0 1 7 0 1 0 1 1 0 0 1 4 1 0 0 2 19
South Carolina 0 0 0 1 6 2 5 1 5 1 3 1 0 29 7 3 0 8 72
South Dakota 0 0 0 37 1,039 51 229 113 208 39 21 20 2 203 149 57 40 152 2,360
Tennessee 0 0 0 56 26 14 18 22 11 19 9 4 18 33 24 16 8 7 285
Texas 0 0 0 202 720 176 195 354 260 64 115 89 27 1,868 183 379 275 370 5,277
Utah 0 0 0 0 1 11 52 158 70 26 2 2 3 5 7 2 8 13 360
Vermont 0 0 0 1 3 0 0 0 0 0 0  0 1 3 2 0 0 2 12
Virginia 0 0 0 29 26 5 1 5 5 1 5 5 9 30 6 7  21 8 163
Washington 0 0 0 0 0 0 0 3 0 3 38 2 0 4 1 12 24 9 96
West Virginia 0 0 0 3 2 0 0 1 0 1 0 0 2 10 1 0 0 1 21
Wisconsin 0 0 0 52 17 12 17 21 13 8 1 2 3 57 21 6 9 13 252
Wyoming 0 0 0 2 375 10 12 65 181 8 12 6 3 7 41 5 8 11 746
Total 62 21 66 4,156 9,862 2,539 3,000 4,269 3,630 1,356 720 1,021 712 5,674 2,469 2,205 2,175 2,149 46,086

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West Nile virus neuroinvasive disease cases reported to CDC by state of residence, 1999-2016

State 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 Total
Alabama 0 0 2 34 25 15 6 8 17 11 0 1 5 38 3 0 5 13 183
Alaska 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Arizona 0 0 0 0 7 215 52 68 50 62 12 107 49 87 50 80 67 57 963
Arkansas 0 0 0 32 23 17 13 24 13 7 6 6 1 44 16 9 16 8 235
California 0 0 0 1 2 291 305 81 154 292 67 72 110 297 237 561 585 335 3,390
Colorado 0 0 0 6 621 41 21 66 99 17 36 26 2 62 90 46 57 59 1,249
Connecticut 0 0 6 10 12 0 4 7 2 5 0 7 8 12 1 3 8 1 86
Delaware 0 0 0 0 12 0 1 0 1 0 0 0 1 2 3 0 0 0 20
Dist. of Columbia 0 0 0 14 3 1 3 0 0 4 2 3 10 8 0 1 3 1 53
Florida 0 0 12 28 61 33 10 3 3 3 2 9 20 52 5 12 12 6 271
Georgia 0 0 6 28 27 14 9 2 23 4 4 4 14 46 4 11 13 4 213
Hawaii 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Idaho 0 0 0 0 0 1 3 139 11 4 9 0 1 5 14 6 5 3 201
Illinois 0 0 0 553 30 29 137 127 63 12 5 45 22 187 86 36 51 98 1,481
Indiana 0 0 0 180 15 8 11 27 14 3 2 6 7 46 19 9 16 15 378
Iowa 0 0 0 27 81 13 14 22 12 3 0 5 5 11 24 5 4 16 242
Kansas 0 0 0 22 89 18 17 17 14 14 4 4 4 20 34 18 12 18 305
Kentucky 0 0 0 53 11 1 5 5 4 3 3 2 4 13 1 0 1 5 111
Louisiana 0 0 1 204 101 85 117 91 27 18 10 20 6 155 34 61 41 38 1,009
Maine 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 2
Maryland 0 0 6 22 49 10 4 10 6 6 0 17 10 25 11 6 31 6 219
Massachusetts 0 0 3 19 12 0 4 2 3 1 0 6 5 25 7 5 7 10 109
Michigan 0 0 0 557 14 13 54 43 16 11 1 25 32 141 24 1 16 42 990
Minnesota 0 0 0 16 48 13 18 31 44 2 1 4 1 34 31 6 3 38 290
Mississippi 0 0 0 162 34 31 39 89 50 22 31 3 31 103 27 26 25 27 700
Missouri 0 0 0 126 39 27 17 51 61 12 4 3 6 17 24 10 23 9 429
Montana 0 0 0 2 75 2 8 12 37 0 2 0 1 1 10 2 3 3 158
Nebraska 0 0 0 84 194 7 55 45 21 7 11 10 14 42 54 41 19 35 639
Nevada 0 0 0 0 2 25 14 34 2 9 7 0 12 5 8 3 4 13 138
New Hampshire 0 0 0 0 2 0 0 0 0 0 0 1 0 1 1 0 0 0 5
New Jersey 0 5 12 16 21 1 3 2 1 6 3 15 2 22 10 6 23 11 159
New Mexico 0 0 0 0 74 32 20 3 39 5 6 21 4 24 24 19 12 6 289
New York 59 14 13 68 57 7 30 16 16 32 6 89 28 61 18 19 42 20 595
North Carolina 0 0 0 2 16 3 2 1 4 2 0 0 2 7 3 0 4 2 48
North Dakota 0 0 0 3 94 2 12 20 49 2 0 2 1 39 64 12 10 24 334
Ohio 0 0 0 310 84 11 46 36 13 14 0 4 10 76 21 10 23 12 670
Oklahoma 0 0 0 16 56 16 17 27 59 4 8 1 1 103 60 9 49 21 447
Oregon 0 0 0 0 0 0 1 7 7 3 1 0 0 0 7 7 0 2 35
Pennsylvania 0 0 3 42 145 10 14 8 5 12 0 19 5 33 6 11 17 12 342
Puerto Rico 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1
Rhode Island 0 0 0 1 5 0 1 0 0 1 0 0 1 2 1 0 0 2 14
South Carolina 0 0 0 1 3 0 5 1 3 0 3 1 0 20 3 3 0 6 49
South Dakota 0 0 0 17 151 6 36 38 48 11 6 4 0 62 57 12 11 35 494
Tennessee 0 0 0 47 21 13 15 16 5 12 4 2 16 19 17 12 5 3 207
Texas 0 0 0 202 431 119 128 233 170 40 93 77 20 844 113 253 196 252 3,171
Utah 0 0 0 0 0 6 21 56 28 6 1 1 1 3 4 1 5 7 140
Vermont 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 2 5
Virginia 0 0 0 16 19 5 0 0 3 0 5 4 8 20 6 5 13 6 110
Washington 0 0 0 0 0 0 0 0 0 2 26 1 0 4 0 7 8 8 56
West Virginia 0 0 0 3 1 0 0 1 0 1 0 0 2 5 1 0 0 0 14
Wisconsin 0 0 0 22 7 5 11 11 7 4 1 0 2 44 17 3 6 10 150
Wyoming 0 0 0 0 92 2 6 15 23 0 4 2 1 3 16 0 3 8 175
Total 59 19 64 2,946 2,866 1,148 1,309 1,495 1,227 689 386 629 486 2,873 1,267 1,347 1,455 1,309 21,574

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West Nile virus disease cases and deaths reported to CDC by year and clinical presentation, 1999-2016

Neuroinvasive disease Non-neuroinvasive disease Total
Year Cases
No.
Deaths
No. (%)
Cases
No.
Deaths
No. (%)
Cases
No.
Deaths
No. (%)
1999 59 7  (12) 3 0  (0) 62 7  (11)
2000 19 2  (11) 2 0  (0) 21 2  (10)
 2001  64  10  (16)  2  0  (0)  66  10  (15)
 2002  2,964 276  (9)  1,210  8  (1)  4,156  284  (7)
2003 2,866 232  (8) 6,996 32  (<1) 9,862 264  (3)
2004 1,148 94  (8) 1,391 6  (<1) 2,539 100  (4)
2005 1,309 104  (8) 1,691 15  (1) 3,000 119  (4)
2006 1,495 162  (11) 2,774 15  (1) 4,269 177 (4)
2007 1,227 117  (10) 2,403 7  (<1) 3,630 124  (3)
2008 689 41  (6) 667 3  (<1) 1,356 44  (3)
2009 386 32  (8) 334 0  (0) 720 32  (4)
2010 629 54  (9) 392 3  (1) 1,021 57  (6)
2011 486 42  (9) 226 1  (<1) 712 43  (6)
 2012  2,873 270  (9)  2,801  16  (1)  5,674 286  (5)
 2013  1,267 111  (9)  1,202  8  (<1)  2,469 119  (5)
 2014  1,347 87  (6)  858  10  (1)  2,205 97  (4)
 2015  1,455 142  (10)  720  4  (<1)  2,175 146  (7)
2016  1,309 105  (8)  840  1  (<1)  2,149 106  (5)
Total  21,574 1,888  (9)   24,512  129  (<1)  46,086 2,017  (4) 

Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention

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Average annual incidence of West Nile virus neuroinvasive disease reported to CDC by age group, 1999-2016

Graph depicting Average annual incidence of West Nile virus neuroinvasive disease reported to CDC by age group, 1999-2016

Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention

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Average annual incidence of West Nile virus neuroinvasive disease reported to CDC by county, 1999-2016

Map of the United States showing the average annual incidence of West Nile virus neuroinvasive disease reported to CDC by county, 1999-2016.

Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention

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Average annual incidence of West Nile virus neuroinvasive disease reported to CDC by state, 1999-2016

Map of the United States showing average annual incidence of West Nile virus neuroinvasive disease reported to CDC by state, 1999-2016

Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention

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West Nile virus neuroinvasive disease incidence reported to CDC by year, 1999-2016

Graph showing West Nile virus neuroinvasive disease incidence reported to CDC by year, 1999-2016.

Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention

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West Nile virus disease cases reported to CDC by week of illness onset, 1999-2016

Graph showing West Nile virus disease cases reported to CDC by week of illness onset, 1999-2016

Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention

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