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2017 Case Counts in the US

See Also

  • Cases in Pregnant Women

    CDC reports the number of pregnant women with any laboratory evidence of possible Zika virus infection in the United States and territories.

  • Pregnancy Outcomes

    CDC reports the outcomes of pregnancies with laboratory evidence of possible Zika virus infection in the United States.

  • Information for Blood and Tissue Collection Centers

    See information on areas of active Zika virus transmission risk for the purposes of blood and tissue safety intervention.

2017  |  2016  |  2015

Provisional Data* as of November 29, 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. This webpage contains provisional data reported to ArboNET for January 1, 2017 – November 29, 2017.

US States

  • 362 symptomatic Zika virus disease cases reported†
    • 356 cases in travelers returning from affected areas
    • 2 cases acquired through presumed local mosquito-borne transmission in Florida (N=1) and Texas (N=1)
    • 4 cases acquired through sexual transmission

US Territories

  • 594 symptomatic Zika virus disease cases reported†
    • 0 cases in travelers returning from affected areas
    • 594 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 States.

‡Sexually 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.

See Also

  • Cases in Pregnant Women

    CDC reports the number of pregnant women with any laboratory evidence of possible Zika virus infection in the United States and territories.

  • Pregnancy Outcomes

    CDC reports the outcomes of pregnancies with laboratory evidence of possible Zika virus infection in the United States.

  • Information for Blood and Tissue Collection Centers

    See information on areas of active Zika virus transmission risk for the purposes of blood and tissue safety intervention.

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 29, 2017)
Symptomatic disease cases*

(N=362)

 Presumptive viremic blood donors†

(N=21)
States No. (%) No. (%)
Alabama 3 (1) 3 (14)
Alaska 1 (<1) 0 (0)
Arizona 2 (<1) 0 (0)
Arkansas 0 (0) 0 (0)
California 41 (11) 4 (19)
Colorado 6 (2) 0 (0)
Connecticut 0 (0) 0 (0)
Delaware 0 (0) 0 (0)
District of Columbia 2 (1) 0 (0)
Florida‡ 88 (24) 5 (24)
Georgia 2 (1) 0 (0)
Hawaii 2 (1) 0 (0)
Idaho 0 (0) 0 (0)
Illinois 7 (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) 5 (24)
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 59 (16) 1 (5)
North Carolina 5 (1) 0 (0)
North Dakota 0 (0) 0 (0)
Ohio 3 (1) 0 (0)
Oklahoma 1 (<1) 0 (0)
Oregon 5 (1) 0 (0)
Pennsylvania 5 (1) 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‡ 40 (11) 1 (5)
Utah 4 (1) 0 (0)
Vermont 3 (1) 0 (0)
Virginia 6 (2) 0 (0)
Washington 11 (3) 0 (0)
West Virginia 1 (<1) 1 (5)
Wisconsin 4 (1) 0 (0)
Wyoming 2 (1) 0 (0)
  Symptomatic disease cases*

(N=594)

 Presumptive viremic blood donors†

(N=6)
Territories No. (%) No. (%)
American Samoa 64 (11) 0 (0)
Puerto Rico 486 (82) 6 (100)
U.S. Virgin Islands 44 (8) 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.

‡Includes 1 case in Florida and 1 case in Texas that were acquired through presumed local mosquito-borne transmission.

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