West Nile Virus Disease Cases by State 2020
West Nile Virus Disease Cases* and Presumptive Viremic Blood Donors by State – United States, 2020 (as of January 5, 2021)
| State | Neuroinvasive Disease Cases† |
Non–neuroinvasive Disease Cases |
Total cases |
Deaths | Presumptive viremic blood donors‡ |
|---|---|---|---|---|---|
| Alabama | 5 | 3 | 8 | 0 | 3 |
| Arizona | 7 | 2 | 9 | 2 | 0 |
| Arkansas | 2 | 0 | 2 | 0 | 0 |
| California | 141 | 43 | 184 | 8 | 25 |
| Colorado | 17 | 18 | 35 | 1 | 8 |
| Connecticut | 4 | 3 | 7 | 0 | 0 |
| Florida | 42 | 7 | 49 | 3 | 40 |
| Georgia | 7 | 1 | 8 | 1 | 4 |
| Idaho | 5 | 1 | 6 | 0 | 0 |
| Illinois | 24 | 4 | 28 | 2 | 0 |
| Indiana | 3 | 0 | 3 | 0 | 0 |
| Iowa | 2 | 1 | 3 | 0 | 0 |
| Kansas | 0 | 1 | 1 | 0 | 0 |
| Louisiana | 14 | 4 | 18 | 3 | 5 |
| Maine | 1 | 0 | 1 | 0 | 0 |
| Maryland | 0 | 1 | 1 | 0 | 0 |
| Massachusetts | 6 | 1 | 7 | 0 | 1 |
| Michigan | 29 | 3 | 32 | 0 | 3 |
| Mississippi | 4 | 3 | 7 | 0 | 0 |
| Missouri | 1 | 0 | 1 | 0 | 0 |
| Montana | 1 | 0 | 1 | 0 | 0 |
| Nebraska | 9 | 6 | 15 | 1 | 3 |
| Nevada | 0 | 1 | 1 | 0 | 0 |
| New Jersey | 3 | 0 | 3 | 0 | 1 |
| New Mexico | 5 | 0 | 5 | 1 | 0 |
| New York | 3 | 1 | 4 | 1 | 1 |
| North Carolina | 1 | 0 | 1 | 0 | 0 |
| North Dakota | 2 | 4 | 6 | 0 | 1 |
| Ohio | 2 | 0 | 2 | 0 | 0 |
| Oklahoma | 3 | 1 | 4 | 0 | 1 |
| Oregon | 0 | 1 | 1 | 0 | 0 |
| Pennsylvania | 6 | 3 | 9 | 0 | 0 |
| South Carolina | 4 | 0 | 4 | 0 | 2 |
| South Dakota | 6 | 8 | 14 | 0 | 0 |
| Texas | 59 | 10 | 69 | 15 | 31 |
| Utah | 1 | 1 | 2 | 0 | 0 |
| Virginia | 1 | 1 | 2 | 0 | 1 |
| Washington | 0 | 2 | 2 | 0 | 0 |
| Wisconsin | 1 | 0 | 1 | 0 | 0 |
| Wyoming | 1 | 0 | 1 | 0 | 0 |
| Totals | 422 | 135 | 557 | 38 | 130 |
*Includes confirmed and probable cases.
†Includes cases reported as meningitis, encephalitis, or acute flaccid paralysis.
‡Presumptive viremic blood donors (PVDs) are people who had no symptoms at the time of donating blood through a blood collection agency, but whose blood tested positive when screened for the presence of West Nile virus. Some PVDs develop symptoms after donation.
Please refer to state health department web sites for further details regarding state case totals.
Page last reviewed: January 5, 2021