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 May 25, 2021)

West Nile Virus Disease Cases and Presumptive Viremic Blood Donors by State – United States, 2020
State Neuroinvasive
Disease Cases†
Non–neuroinvasive
Disease Cases
Total
cases
Deaths Presumptive viremic
blood donors‡
Alabama 6 2 8 0 3
Arizona 7 4 11 2 0
California 176 52 228 11 30
Colorado 17 18 35 1 8
Connecticut 4 3 7 0 0
Florida 43 7 50 3 40
Georgia 7 1 8 1 4
Idaho 5 1 6 0 1
Illinois 25 4 29 4 0
Indiana 4 0 4 0 0
Iowa 2 1 3 0 0
Kansas 5 2 7 0 0
Louisiana 14 4 18 3 5
Maine 1 0 1 0 0
Maryland 1 0 1 0 0
Massachusetts 9 3 12 1 2
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 6 1 7 1 0
New York 5 3 8 1 1
North Carolina 1 0 1 0 0
North Dakota 2 4 6 0 1
Ohio 3 0 3 0 0
Oklahoma 6 1 7 3 1
Oregon 0 1 1 0 0
Pennsylvania 7 4 11 0 0
South Carolina 4 0 4 0 2
South Dakota 7 10 17 0 0
Texas 84 16 100 20 31
Utah 1 1 2 0 0
Virginia 1 1 2 0 1
Washington 0 2 2 0 0
Wisconsin 4 0 4 0 0
Wyoming 1 0 1 0 0
Totals 505 159 664 52 137

*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.