This information is provided by the CDC Provisional Data* as of November 1, 2017 Zika virus disease is a nationally notifiable condition. Cases are reported to CDC by state, territorial, and local health departments using standard case definitions.

US States

  • 331 symptomatic Zika virus disease cases reported
    • 327 cases in travelers returning from affected areas
    • 1 case acquired through presumed local mosquito-borne transmission
    • 3 cases acquired through sexual transmission

US Territories

  • 583 symptomatic Zika virus disease cases reported
    • 0 cases in travelers returning from affected areas
    • 583 cases acquired through presumed local mosquito-borne transmission
    • 0 cases acquired through other routes

Footnotes *Data are provisional and might not reflect the actual number of Zika virus disease cases due to delays in reporting. Excludes congenital disease cases. Data reported to the US Zika Pregnancy Registry for outcomes of pregnancies with laboratory evidence of possible Zika virus infection in the United States is available at Outcomes of Pregnancies with Laboratory Evidence of Possible Zika Virus Infection in the United StatesSexually transmitted cases are not reported for US territories because with local transmission of Zika virus it is not possible to determine whether infection occurred due to mosquito-borne or sexual transmission.

Cases by State and Territory

Map of laboratory-confirmed symptomatic Zika virus disease cases reported to ArboNET by states and territories

Laboratory-confirmed symptomatic Zika virus disease cases and presumptive viremic blood donors reported to ArboNET by states and territories— United States, 2017
Laboratory-confirmed symptomatic Zika virus disease cases and presumptive viremic blood donors reported to ArboNET by states and territories— United States, 2017 (Provisional data as of November 1, 2017)
Symptomatic disease cases*(N=331) Presumptive viremic blood donors†(N=14)
States No. (%) No. (%)
Alabama 3 (1) 3 (21)
Alaska 1 (<1) 0 (0)
Arizona 1 (<1) 0 (0)
Arkansas 0 (0) 0 (0)
California 35 (11) 3 (21)
Colorado 6 (2) 0 (0)
Connecticut 0 (0) 0 (0)
Delaware 0 (0) 0 (0)
District of Columbia 1 (<1) 0 (0)
Florida 69 (21) 4 (29)
Georgia 2 (1) 0 (0)
Hawaii 2 (1) 0 (0)
Idaho 0 (0) 0 (0)
Illinois 6 (2) 0 (0)
Indiana 2 (1) 0 (0)
Iowa 1 (<1) 0 (0)
Kansas 2 (1) 0 (0)
Kentucky 2 (1) 0 (0)
Louisiana 1 (<1) 0 (0)
Maine 1 (<1) 0 (0)
Maryland 10 (3) 0 (0)
Massachusetts 9 (3) 0 (0)
Michigan 7 (2) 0 (0)
Minnesota 6 (2) 0 (0)
Mississippi 2 (1) 0 (0)
Missouri 1 (<1) 0 (0)
Montana 0 (0) 0 (0)
Nebraska 1 (<1) 0 (0)
Nevada 1 (<1) 0 (0)
New Hampshire 0 (0) 0 (0)
New Jersey 8 (2) 0 (0)
New Mexico 0 (0) 0 (0)
New York 58 (18) 1 (8)
North Carolina 5 (2) 0 (0)
North Dakota 0 (0) 0 (0)
Ohio 3 (1) 0 (0)
Oklahoma 1 (<1) 0 (0)
Oregon 5 (2) 0 (0)
Pennsylvania 5 (2) 1 (7)
Rhode Island 3 (1) 0 (0)
South Carolina 2 (1) 0 (0)
South Dakota 0 (0) 0 (0)
Tennessee 0 (0) 0 (0)
Texas 39 (12) 1 (7)
Utah 4 (1) 0 (0)
Vermont 3 (1) 0 (0)
Virginia 6 (2) 0 (0)
Washington 10 (3) 0 (0)
West Virginia 1 (<1) 1 (7)
Wisconsin 4 (1) 0 (0)
Wyoming 2 (1) 0 (0)
  Symptomatic disease cases*(N=583) Presumptive viremic blood donors(N=6)
Territories No. (%) No. (%)
American Samoa 65 (11) 0 (0)
Puerto Rico 476 (82) 6 (100)
U.S. Virgin Islands 42 (7) 0 (0)

Footnotes *Includes reported confirmed and probable Zika virus disease cases per the CSTE case definitions. †Presumptive viremic blood donors are people who reported no symptoms at the time of donating blood, but whose blood tested positive when screened for the presence of Zika virus RNA by the blood collection agency. Some presumptive viremic blood donors develop symptoms after their donation or may have had symptoms in the past.  These individuals may be reported as both Zika virus disease cases and presumptive viremic blood donors.

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