West Nile Virus Disease Cases by State 2021

West Nile Virus Disease Cases* and Presumptive Viremic Blood Donors by State – United States, 2021 (as of January 11, 2022)

West Nile Virus Disease Cases and Presumptive Viremic Blood Donors by State – United States, 2021
State Neuroinvasive
Disease Cases†
Non–neuroinvasive
Disease Cases
Total
cases
Deaths Presumptive viremic
blood donors‡
Alabama 9 3 12 0 3
Alaska 1 0 1 0 0
Arizona 1,114 531 1,645 112 122
Arkansas 2 0 2 2 0
California 88 27 115 11 18
Colorado 99 75 174 10 24
Connecticut 4 2 6 0 3
Delaware 3 0 3 0 0
District of Columbia 3 2 5 1 0
Florida 5 0 5 0 2
Georgia 3 1 4 1 1
Idaho 12 4 16 2 4
Illinois 44 17 61 3 4
Indiana 10 2 12 1 1
Iowa 4 2 6 0 3
Kansas 8 2 10 0 6
Kentucky 3 0 3 0 0
Louisiana 16 5 21 2 1
Maine 0 0 0 0 1
Maryland 2 2 4 0 0
Massachusetts 8 2 10 0 0
Michigan 35 11 46 7 7
Minnesota 20 7 27 0 17
Mississippi 4 3 7 0 0
Missouri 11 1 12 1 0
Montana 2 0 2 0 0
Nebraska 69 38 107 8 18
Nevada 1 0 1 0 0
New Jersey 26 10 36 5 3
New Mexico 30 4 34 7 7
New York 35 5 40 1 3
North Carolina 8 0 8 1 2
North Dakota 12 18 30 1 9
Ohio 11 2 13 1 1
Oklahoma 2 1 3 0 2
Oregon 2 3 5 0 0
Pennsylvania 21 5 26 1 1
Rhode Island 1 1 2 0 0
South Carolina 6 3 9 0 8
South Dakota 17 30 47 1 6
Tennessee 3 1 4 0 0
Texas 68 9 77 9 47
Utah 21 7 28 3 0
Vermont 1 0 1 0 0
Virginia 2 2 4 0 0
Washington 4 0 4 0 4
Wisconsin 5 1 6 0 1
Wyoming 0 1 1 0 0
Totals 1,855 840 2,695 191 329

*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.