Final Cumulative Maps & Data for 1999–2021
- West Nile virus disease cases reported to CDC by state and year, 1999-2021
- West Nile virus neuroinvasive disease cases reported to CDC by state and year, 1999-2021
- West Nile virus disease cases and deaths reported to CDC by year and clinical presentation, 1999-2021
- Average annual incidence of West Nile virus neuroinvasive disease by age group, 1999-2021
- Average annual incidence of West Nile virus neuroinvasive disease reported to CDC by county, 1999-2021
- Average annual incidence of West Nile virus neuroinvasive disease reported to CDC by state, 1999-2021
- West Nile virus neuroinvasive disease incidence reported to CDC by year, 1999-2021
- West Nile virus disease cases reported to CDC by week of illness onset, 1999-2021
West Nile virus disease cases reported to CDC by state of residence, 1999-2021
State | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Total |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Alabama | 0 | 0 | 2 | 49 | 37 | 16 | 10 | 8 | 24 | 18 | 0 | 3 | 5 | 62 | 9 | 2 | 9 | 19 | 60 | 28 | 5 | 9 | 12 | 387 |
Alaska | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 3 |
Arizona | 0 | 0 | 0 | 0 | 13 | 391 | 113 | 150 | 97 | 114 | 20 | 167 | 69 | 133 | 62 | 107 | 103 | 78 | 111 | 26 | 174 | 12 | 1,715 | 3,655 |
Arkansas | 0 | 0 | 0 | 43 | 25 | 28 | 28 | 29 | 20 | 9 | 6 | 7 | 1 | 64 | 18 | 11 | 18 | 9 | 18 | 8 | 9 | 1 | 8 | 360 |
California | 0 | 0 | 0 | 1 | 3 | 779 | 880 | 278 | 380 | 445 | 112 | 111 | 158 | 479 | 379 | 801 | 783 | 442 | 553 | 217 | 225 | 235 | 130 | 7,391 |
Colorado | 0 | 0 | 0 | 14 | 2,947 | 291 | 106 | 345 | 576 | 71 | 103 | 81 | 7 | 131 | 322 | 118 | 101 | 149 | 68 | 96 | 122 | 35 | 175 | 5,858 |
Connecticut | 0 | 1 | 6 | 17 | 17 | 1 | 6 | 9 | 4 | 8 | 0 | 11 | 9 | 21 | 4 | 6 | 10 | 1 | 3 | 23 | 1 | 8 | 7 | 173 |
Delaware | 0 | 0 | 0 | 1 | 17 | 0 | 2 | 0 | 1 | 1 | 0 | 0 | 1 | 9 | 3 | 0 | 6 | 0 | 1 | 10 | 0 | 0 | 3 | 55 |
Dist. of Columbia | 0 | 0 | 0 | 34 | 3 | 2 | 5 | 2 | 0 | 8 | 2 | 6 | 15 | 10 | 1 | 3 | 5 | 1 | 4 | 13 | 11 | 0 | 6 | 131 |
Florida | 0 | 0 | 12 | 28 | 94 | 41 | 21 | 3 | 3 | 3 | 3 | 12 | 24 | 73 | 7 | 17 | 13 | 8 | 5 | 35 | 2 | 51 | 5 | 460 |
Georgia | 0 | 0 | 6 | 44 | 50 | 21 | 20 | 8 | 50 | 8 | 4 | 13 | 22 | 99 | 10 | 13 | 15 | 6 | 48 | 36 | 14 | 8 | 4 | 499 |
Hawaii | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
Idaho | 0 | 0 | 0 | 0 | 1 | 3 | 13 | 996 | 132 | 39 | 38 | 1 | 3 | 17 | 40 | 19 | 13 | 9 | 25 | 16 | 13 | 6 | 16 | 1,400 |
Illinois | 0 | 0 | 0 | 884 | 54 | 60 | 252 | 215 | 101 | 20 | 5 | 61 | 34 | 290 | 117 | 44 | 77 | 154 | 90 | 176 | 28 | 42 | 64 | 2,768 |
Indiana | 0 | 0 | 0 | 293 | 47 | 13 | 23 | 80 | 24 | 4 | 4 | 13 | 9 | 77 | 23 | 10 | 21 | 18 | 26 | 35 | 4 | 3 | 14 | 741 |
Iowa | 0 | 0 | 0 | 54 | 147 | 23 | 37 | 37 | 30 | 6 | 5 | 9 | 9 | 31 | 44 | 15 | 14 | 37 | 12 | 104 | 5 | 3 | 6 | 628 |
Kansas | 0 | 0 | 0 | 22 | 91 | 43 | 25 | 30 | 40 | 31 | 13 | 19 | 4 | 56 | 91 | 54 | 34 | 37 | 27 | 47 | 13 | 8 | 17 | 702 |
Kentucky | 0 | 0 | 0 | 75 | 14 | 7 | 5 | 6 | 4 | 3 | 3 | 3 | 5 | 23 | 3 | 1 | 2 | 8 | 10 | 12 | 10 | 0 | 4 | 198 |
Louisiana | 0 | 0 | 1 | 329 | 124 | 109 | 171 | 180 | 40 | 49 | 21 | 27 | 10 | 335 | 54 | 125 | 51 | 59 | 53 | 83 | 20 | 18 | 22 | 1,881 |
Maine | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 2 | 0 | 1 | 0 | 5 |
Maryland | 0 | 0 | 6 | 36 | 73 | 16 | 5 | 11 | 10 | 14 | 1 | 23 | 19 | 47 | 16 | 6 | 45 | 6 | 6 | 45 | 7 | 1 | 8 | 401 |
Massachusetts | 0 | 0 | 3 | 23 | 17 | 0 | 6 | 3 | 6 | 1 | 0 | 7 | 6 | 33 | 8 | 6 | 10 | 17 | 6 | 49 | 5 | 12 | 11 | 229 |
Michigan | 0 | 0 | 0 | 614 | 19 | 16 | 62 | 55 | 17 | 17 | 1 | 29 | 34 | 202 | 36 | 1 | 18 | 43 | 40 | 102 | 12 | 32 | 47 | 1,397 |
Minnesota | 0 | 0 | 0 | 48 | 148 | 34 | 45 | 65 | 101 | 10 | 4 | 8 | 2 | 70 | 79 | 21 | 9 | 83 | 30 | 63 | 5 | 0 | 36 | 861 |
Mississippi | 0 | 0 | 0 | 192 | 87 | 51 | 70 | 183 | 136 | 65 | 53 | 8 | 52 | 247 | 45 | 43 | 38 | 43 | 63 | 50 | 15 | 7 | 8 | 1,456 |
Missouri | 0 | 0 | 0 | 168 | 64 | 36 | 30 | 62 | 77 | 15 | 5 | 3 | 10 | 20 | 29 | 13 | 29 | 11 | 19 | 23 | 5 | 1 | 12 | 632 |
Montana | 0 | 0 | 0 | 2 | 222 | 6 | 25 | 34 | 202 | 5 | 5 | 0 | 1 | 6 | 38 | 5 | 3 | 6 | 11 | 47 | 3 | 1 | 2 | 624 |
Nebraska | 0 | 0 | 0 | 152 | 1,942 | 53 | 188 | 264 | 163 | 47 | 52 | 39 | 29 | 193 | 226 | 142 | 68 | 95 | 68 | 251 | 28 | 15 | 107 | 4,122 |
Nevada | 0 | 0 | 0 | 0 | 2 | 44 | 31 | 124 | 12 | 16 | 12 | 2 | 16 | 9 | 11 | 3 | 7 | 16 | 67 | 9 | 46 | 1 | 1 | 429 |
New Hampshire | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 8 |
New Jersey | 0 | 6 | 12 | 24 | 34 | 1 | 6 | 5 | 1 | 10 | 3 | 30 | 7 | 48 | 12 | 8 | 26 | 11 | 8 | 61 | 8 | 3 | 36 | 360 |
New Mexico | 0 | 0 | 0 | 0 | 209 | 88 | 33 | 8 | 60 | 8 | 8 | 25 | 4 | 47 | 38 | 24 | 14 | 6 | 33 | 7 | 40 | 8 | 34 | 694 |
New York | 62 | 14 | 15 | 82 | 71 | 10 | 38 | 24 | 22 | 46 | 7 | 128 | 44 | 107 | 32 | 26 | 57 | 22 | 51 | 98 | 17 | 22 | 42 | 1,037 |
North Carolina | 0 | 0 | 0 | 2 | 24 | 3 | 4 | 1 | 8 | 3 | 0 | 0 | 2 | 7 | 3 | 0 | 4 | 2 | 8 | 10 | 1 | 1 | 8 | 91 |
North Dakota | 0 | 0 | 0 | 17 | 617 | 20 | 86 | 137 | 369 | 37 | 1 | 9 | 4 | 89 | 125 | 23 | 23 | 85 | 62 | 204 | 9 | 7 | 30 | 1,954 |
Ohio | 0 | 0 | 0 | 441 | 108 | 12 | 61 | 48 | 23 | 15 | 2 | 5 | 21 | 121 | 24 | 11 | 35 | 17 | 34 | 65 | 3 | 3 | 13 | 1,062 |
Oklahoma | 0 | 0 | 0 | 21 | 79 | 22 | 31 | 48 | 107 | 9 | 10 | 1 | 1 | 191 | 89 | 18 | 89 | 35 | 42 | 18 | 8 | 7 | 22 | 848 |
Oregon | 0 | 0 | 0 | 0 | 0 | 3 | 7 | 69 | 26 | 16 | 11 | 0 | 0 | 11 | 16 | 8 | 1 | 4 | 6 | 2 | 9 | 1 | 5 | 195 |
Pennsylvania | 0 | 0 | 3 | 62 | 237 | 15 | 25 | 9 | 10 | 14 | 0 | 28 | 6 | 60 | 11 | 13 | 30 | 16 | 20 | 130 | 7 | 11 | 27 | 734 |
Puerto Rico | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 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 | 2 | 1 | 0 | 0 | 2 | 24 |
South Carolina | 0 | 0 | 0 | 1 | 6 | 2 | 5 | 1 | 5 | 1 | 3 | 1 | 0 | 29 | 7 | 3 | 0 | 8 | 18 | 15 | 2 | 4 | 9 | 120 |
South Dakota | 0 | 0 | 0 | 37 | 1,039 | 51 | 229 | 113 | 208 | 39 | 21 | 20 | 2 | 203 | 149 | 57 | 40 | 152 | 73 | 169 | 11 | 20 | 47 | 2,680 |
Tennessee | 0 | 0 | 0 | 56 | 26 | 14 | 18 | 22 | 11 | 19 | 9 | 4 | 18 | 33 | 24 | 16 | 8 | 7 | 30 | 12 | 3 | 0 | 4 | 334 |
Texas | 0 | 0 | 0 | 202 | 720 | 176 | 195 | 354 | 260 | 64 | 115 | 89 | 27 | 1,868 | 183 | 379 | 275 | 370 | 135 | 146 | 32 | 122 | 143 | 5,855 |
Utah | 0 | 0 | 0 | 0 | 1 | 11 | 52 | 158 | 70 | 26 | 2 | 2 | 3 | 5 | 7 | 2 | 8 | 13 | 62 | 11 | 21 | 2 | 28 | 484 |
Vermont | 0 | 0 | 0 | 1 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 2 | 0 | 0 | 2 | 3 | 1 | 0 | 0 | 1 | 17 |
Virginia | 0 | 0 | 0 | 29 | 26 | 5 | 1 | 5 | 5 | 1 | 5 | 5 | 9 | 30 | 6 | 7 | 21 | 8 | 13 | 48 | 6 | 2 | 5 | 237 |
Washington | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 3 | 38 | 2 | 0 | 4 | 1 | 12 | 24 | 9 | 13 | 3 | 5 | 2 | 4 | 123 |
West Virginia | 0 | 0 | 0 | 3 | 2 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 2 | 10 | 1 | 0 | 0 | 1 | 1 | 2 | 0 | 0 | 0 | 24 |
Wisconsin | 0 | 0 | 0 | 52 | 17 | 12 | 17 | 21 | 13 | 8 | 1 | 2 | 3 | 57 | 21 | 6 | 9 | 13 | 51 | 33 | 2 | 5 | 8 | 351 |
Wyoming | 0 | 0 | 0 | 2 | 375 | 10 | 12 | 65 | 181 | 8 | 12 | 6 | 3 | 7 | 41 | 5 | 8 | 11 | 7 | 4 | 4 | 1 | 1 | 763 |
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 | 2,097 | 2,647 | 971 | 731 | 2,911 | 55,443 |
West Nile virus neuroinvasive disease cases reported to CDC by state of residence, 1999-2021
State | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Total |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Alabama | 0 | 0 | 2 | 34 | 25 | 15 | 6 | 8 | 17 | 11 | 0 | 1 | 5 | 38 | 3 | 0 | 5 | 13 | 40 | 16 | 4 | 7 | 9 | 259 |
Alaska | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 2 |
Arizona | 0 | 0 | 0 | 0 | 7 | 215 | 52 | 68 | 50 | 62 | 12 | 107 | 49 | 87 | 50 | 80 | 67 | 57 | 98 | 25 | 132 | 8 | 1,140 | 2,366 |
Arkansas | 0 | 0 | 0 | 32 | 23 | 17 | 13 | 24 | 13 | 7 | 6 | 6 | 1 | 44 | 16 | 9 | 16 | 8 | 15 | 6 | 7 | 1 | 6 | 270 |
California | 0 | 0 | 0 | 1 | 2 | 291 | 305 | 81 | 154 | 292 | 67 | 72 | 110 | 297 | 237 | 561 | 585 | 335 | 401 | 154 | 147 | 179 | 96 | 4,367 |
Colorado | 0 | 0 | 0 | 6 | 621 | 41 | 21 | 66 | 99 | 17 | 36 | 26 | 2 | 62 | 90 | 46 | 57 | 59 | 29 | 52 | 52 | 17 | 101 | 1,500 |
Connecticut | 0 | 0 | 6 | 10 | 12 | 0 | 4 | 7 | 2 | 5 | 0 | 7 | 8 | 12 | 1 | 3 | 8 | 1 | 2 | 18 | 1 | 5 | 5 | 117 |
Delaware | 0 | 0 | 0 | 0 | 12 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 2 | 3 | 0 | 0 | 0 | 0 | 8 | 0 | 0 | 3 | 31 |
Dist. of Columbia | 0 | 0 | 0 | 14 | 3 | 1 | 3 | 0 | 0 | 4 | 2 | 3 | 10 | 8 | 0 | 1 | 3 | 1 | 1 | 7 | 9 | 0 | 4 | 74 |
Florida | 0 | 0 | 12 | 28 | 61 | 33 | 10 | 3 | 3 | 3 | 2 | 9 | 20 | 52 | 5 | 12 | 12 | 6 | 4 | 30 | 2 | 44 | 5 | 356 |
Georgia | 0 | 0 | 6 | 28 | 27 | 14 | 9 | 2 | 23 | 4 | 4 | 4 | 14 | 46 | 4 | 11 | 13 | 4 | 44 | 30 | 9 | 7 | 3 | 306 |
Hawaii | 0 | 0 | 0 | 0 | 0 | 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 | 16 | 10 | 5 | 5 | 12 | 249 |
Illinois | 0 | 0 | 0 | 553 | 30 | 29 | 137 | 127 | 63 | 12 | 5 | 45 | 22 | 187 | 86 | 36 | 51 | 98 | 72 | 126 | 22 | 36 | 49 | 1,786 |
Indiana | 0 | 0 | 0 | 180 | 15 | 8 | 11 | 27 | 14 | 3 | 2 | 6 | 7 | 46 | 19 | 9 | 16 | 15 | 18 | 26 | 4 | 3 | 11 | 440 |
Iowa | 0 | 0 | 0 | 27 | 81 | 13 | 14 | 22 | 12 | 3 | 0 | 5 | 5 | 11 | 24 | 5 | 4 | 16 | 10 | 59 | 1 | 2 | 4 | 318 |
Kansas | 0 | 0 | 0 | 22 | 89 | 18 | 17 | 17 | 14 | 14 | 4 | 4 | 4 | 20 | 34 | 18 | 12 | 18 | 12 | 23 | 7 | 6 | 10 | 363 |
Kentucky | 0 | 0 | 0 | 53 | 11 | 1 | 5 | 5 | 4 | 3 | 3 | 2 | 4 | 13 | 1 | 0 | 1 | 5 | 9 | 9 | 4 | 0 | 4 | 137 |
Louisiana | 0 | 0 | 1 | 204 | 101 | 85 | 117 | 91 | 27 | 18 | 10 | 20 | 6 | 155 | 34 | 61 | 41 | 38 | 38 | 56 | 11 | 14 | 17 | 1,145 |
Maine | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 4 |
Maryland | 0 | 0 | 6 | 22 | 49 | 10 | 4 | 10 | 6 | 6 | 0 | 17 | 10 | 25 | 11 | 6 | 31 | 6 | 5 | 35 | 6 | 1 | 7 | 273 |
Massachusetts | 0 | 0 | 3 | 19 | 12 | 0 | 4 | 2 | 3 | 1 | 0 | 6 | 5 | 25 | 7 | 5 | 7 | 10 | 5 | 42 | 2 | 9 | 9 | 176 |
Michigan | 0 | 0 | 0 | 557 | 14 | 13 | 54 | 43 | 16 | 11 | 1 | 25 | 32 | 141 | 24 | 1 | 16 | 42 | 32 | 80 | 11 | 29 | 38 | 1,180 |
Minnesota | 0 | 0 | 0 | 16 | 48 | 13 | 18 | 31 | 44 | 2 | 1 | 4 | 1 | 34 | 31 | 6 | 3 | 38 | 13 | 34 | 2 | 0 | 27 | 366 |
Mississippi | 0 | 0 | 0 | 162 | 34 | 31 | 39 | 89 | 50 | 22 | 31 | 3 | 31 | 103 | 27 | 26 | 25 | 27 | 46 | 31 | 12 | 4 | 5 | 798 |
Missouri | 0 | 0 | 0 | 126 | 39 | 27 | 17 | 51 | 61 | 12 | 4 | 3 | 6 | 17 | 24 | 10 | 23 | 9 | 17 | 17 | 4 | 1 | 11 | 479 |
Montana | 0 | 0 | 0 | 2 | 75 | 2 | 8 | 12 | 37 | 0 | 2 | 0 | 1 | 1 | 10 | 2 | 3 | 3 | 3 | 25 | 3 | 1 | 2 | 192 |
Nebraska | 0 | 0 | 0 | 84 | 194 | 7 | 55 | 45 | 21 | 7 | 11 | 10 | 14 | 42 | 54 | 41 | 19 | 35 | 19 | 124 | 17 | 9 | 69 | 877 |
Nevada | 0 | 0 | 0 | 0 | 2 | 25 | 14 | 34 | 2 | 9 | 7 | 0 | 12 | 5 | 8 | 3 | 4 | 13 | 31 | 3 | 34 | 0 | 1 | 207 |
New Hampshire | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 6 |
New Jersey | 0 | 5 | 12 | 16 | 21 | 1 | 3 | 2 | 1 | 6 | 3 | 15 | 2 | 22 | 10 | 6 | 23 | 11 | 6 | 44 | 6 | 3 | 26 | 244 |
New Mexico | 0 | 0 | 0 | 0 | 74 | 32 | 20 | 3 | 39 | 5 | 6 | 21 | 4 | 24 | 24 | 19 | 12 | 6 | 23 | 5 | 30 | 7 | 31 | 385 |
New York | 59 | 14 | 13 | 68 | 57 | 7 | 30 | 16 | 16 | 32 | 6 | 89 | 28 | 61 | 18 | 19 | 42 | 20 | 45 | 77 | 14 | 18 | 35 | 784 |
North Carolina | 0 | 0 | 0 | 2 | 16 | 3 | 2 | 1 | 4 | 2 | 0 | 0 | 2 | 7 | 3 | 0 | 4 | 2 | 8 | 10 | 1 | 1 | 8 | 76 |
North Dakota | 0 | 0 | 0 | 3 | 94 | 2 | 12 | 20 | 49 | 2 | 0 | 2 | 1 | 39 | 64 | 12 | 10 | 24 | 20 | 60 | 2 | 2 | 12 | 430 |
Ohio | 0 | 0 | 0 | 310 | 84 | 11 | 46 | 36 | 13 | 14 | 0 | 4 | 10 | 76 | 21 | 10 | 23 | 12 | 23 | 45 | 3 | 3 | 11 | 755 |
Oklahoma | 0 | 0 | 0 | 16 | 56 | 16 | 17 | 27 | 59 | 4 | 8 | 1 | 1 | 103 | 60 | 9 | 49 | 21 | 34 | 12 | 6 | 6 | 19 | 524 |
Oregon | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 7 | 7 | 3 | 1 | 0 | 0 | 0 | 7 | 7 | 0 | 2 | 3 | 2 | 6 | 0 | 1 | 47 |
Pennsylvania | 0 | 0 | 3 | 42 | 145 | 10 | 14 | 8 | 5 | 12 | 0 | 19 | 5 | 33 | 6 | 11 | 17 | 12 | 15 | 95 | 5 | 7 | 22 | 486 |
Puerto Rico | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 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 | 1 | 0 | 0 | 0 | 1 | 16 |
South Carolina | 0 | 0 | 0 | 1 | 3 | 0 | 5 | 1 | 3 | 0 | 3 | 1 | 0 | 20 | 3 | 3 | 0 | 6 | 16 | 12 | 2 | 4 | 6 | 89 |
South Dakota | 0 | 0 | 0 | 17 | 151 | 6 | 36 | 38 | 48 | 11 | 6 | 4 | 0 | 62 | 57 | 12 | 11 | 35 | 27 | 47 | 0 | 10 | 18 | 596 |
Tennessee | 0 | 0 | 0 | 47 | 21 | 13 | 15 | 16 | 5 | 12 | 4 | 2 | 16 | 19 | 17 | 12 | 5 | 3 | 22 | 11 | 3 | 0 | 3 | 246 |
Texas | 0 | 0 | 0 | 202 | 431 | 119 | 128 | 233 | 170 | 40 | 93 | 77 | 20 | 844 | 113 | 253 | 196 | 252 | 87 | 108 | 24 | 101 | 130 | 3,621 |
Utah | 0 | 0 | 0 | 0 | 0 | 6 | 21 | 56 | 28 | 6 | 1 | 1 | 1 | 3 | 4 | 1 | 5 | 7 | 39 | 7 | 14 | 1 | 21 | 222 |
Vermont | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 2 | 2 | 1 | 0 | 0 | 1 | 9 |
Virginia | 0 | 0 | 0 | 16 | 19 | 5 | 0 | 0 | 3 | 0 | 5 | 4 | 8 | 20 | 6 | 5 | 13 | 6 | 12 | 38 | 4 | 1 | 2 | 167 |
Washington | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 26 | 1 | 0 | 4 | 0 | 7 | 8 | 8 | 10 | 2 | 3 | 0 | 4 | 75 |
West Virginia | 0 | 0 | 0 | 3 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 2 | 5 | 1 | 0 | 0 | 0 | 1 | 2 | 0 | 0 | 0 | 17 |
Wisconsin | 0 | 0 | 0 | 22 | 7 | 5 | 11 | 11 | 7 | 4 | 1 | 0 | 2 | 44 | 17 | 3 | 6 | 10 | 47 | 29 | 0 | 5 | 7 | 238 |
Wyoming | 0 | 0 | 0 | 0 | 92 | 2 | 6 | 15 | 23 | 0 | 4 | 2 | 1 | 3 | 16 | 0 | 3 | 8 | 4 | 3 | 2 | 1 | 0 | 185 |
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 | 1,425 | 1,658 | 633 | 559 | 2,008 | 27,857 |
West Nile virus disease cases and deaths reported to CDC by year and clinical presentation, 1999-2021
Year | Neuroinvasive disease Cases No. |
Neuroinvasive disease Deaths No. (%) |
Non-neuroinvasive disease Cases No. |
Non-neuroinvasive disease Deaths No. (%) |
Total Cases No. |
Total 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 | 2,946 | 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) |
2017 | 1,425 | 146 (10) | 672 | 0 (0) | 2,097 | 146 (7) |
2018 | 1,658 | 165 (10) | 989 | 2 (<1) | 2,647 | 167 (6) |
2019 | 633 | 60 (9) | 338 | 0 (0) | 971 | 60 (6) |
2020 | 559 | 66 (12) | 172 | 0 (0) | 731 | 66 (6) |
2021 | 2,008 | 225 (11) | 903 | 2 (<1) | 2,911 | 227 (8) |
Total | 27,857 | 2,550 (9) | 27,586 | 133 (<1) | 55,443 | 2,683 (5) |
Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention
Average annual incidence of West Nile virus neuroinvasive disease reported to CDC by age group, 1999-2021

Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention
Age Group | Average Incidence |
---|---|
<10 | 0.03 |
10-19 | 0.08 |
20-29 | 0.14 |
30-39 | 0.23 |
40-49 | 0.41 |
50-59 | 0.54 |
60-69 | 0.63 |
≥70 | 1.03 |
Average annual incidence of West Nile virus neuroinvasive disease reported to CDC by state, 1999-2021

Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention
State | Average Incidence |
---|---|
Alaska | 0.01 |
Alabama | 0.24 |
Arizona | 1.55 |
Arkansas | 0.41 |
California | 0.51 |
Colorado | 1.23 |
Connecticut | 0.15 |
Delaware | 0.15 |
District of Columbia | 0.49 |
Florida | 0.08 |
Georgia | 0.13 |
Hawaii | 0.00 |
Idaho | 0.67 |
Illinois | 0.63 |
Indiana | 0.30 |
Iowa | 0.46 |
Kansas | 0.57 |
Kentucky | 0.14 |
Louisiana | 1.11 |
Maine | 0.01 |
Maryland | 0.21 |
Massachusetts | 0.12 |
Michigan | 0.54 |
Minnesota | 0.30 |
Mississippi | 1.21 |
Missouri | 0.36 |
Montana | 0.84 |
Nebraska | 2.09 |
Nevada | 0.32 |
New Hampshire | 0.02 |
New Jersey | 0.12 |
New Mexico | 0.84 |
New York | 0.18 |
North Carolina | 0.03 |
North Dakota | 2.58 |
Ohio | 0.29 |
Oklahoma | 0.61 |
Oregon | 0.05 |
Pennsylvania | 0.17 |
Rhode Island | 0.07 |
South Carolina | 0.08 |
South Dakota | 3.14 |
Tennessee | 0.17 |
Texas | 0.59 |
Utah | 0.33 |
Vermont | 0.07 |
Virginia | 0.09 |
Washington | 0.05 |
West Virginia | 0.04 |
Wisconsin | 0.19 |
Wyoming | 1.44 |
West Nile virus neuroinvasive disease incidence reported to CDC by year, 1999-2021

Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention
Year | Incidence per 100,000 population |
---|---|
1999 | 0.02 |
2000 | 0.01 |
2001 | 0.02 |
2002 | 1.02 |
2003 | 0.99 |
2004 | 0.39 |
2005 | 0.44 |
2006 | 0.50 |
2007 | 0.41 |
2008 | 0.23 |
2009 | 0.13 |
2010 | 0.20 |
2011 | 0.16 |
2012 | 0.92 |
2013 | 0.40 |
2014 | 0.42 |
2015 | 0.45 |
2016 | 0.41 |
2017 | 0.44 |
2018 | 0.51 |
2019 | 0.19 |
2020 | 0.17 |
2021 | 0.61 |
West Nile virus disease cases reported to CDC by week of illness onset, 1999-2021

Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention
Month | Week of Onset | Number of Cases |
---|---|---|
January | 1 | 10 |
2 | 4 | |
3 | 4 | |
4 | 2 | |
February | 5 | 6 |
6 | 4 | |
7 | 1 | |
8 | 1 | |
March | 9 | 12 |
10 | 1 | |
11 | 12 | |
12 | 6 | |
April | 13 | 6 |
14 | 8 | |
15 | 11 | |
16 | 14 | |
17 | 13 | |
May | 18 | 23 |
19 | 38 | |
20 | 59 | |
21 | 59 | |
22 | 118 | |
June | 23 | 157 |
24 | 203 | |
25 | 343 | |
26 | 482 | |
July | 27 | 927 |
28 | 1,373 | |
29 | 2,027 | |
30 | 2,890 | |
August | 31 | 4,592 |
32 | 5,079 | |
33 | 6,053 | |
34 | 6,067 | |
September | 35 | 5,814 |
36 | 5,094 | |
37 | 4,241 | |
38 | 2,931 | |
October | 39 | 2,164 |
40 | 1,509 | |
41 | 1,001 | |
42 | 704 | |
43 | 464 | |
November | 44 | 335 |
45 | 203 | |
46 | 131 | |
47 | 74 | |
48 | 59 | |
December | 49 | 48 |
50 | 30 | |
51 | 12 | |
52 | 21 | |
53 | 1 |