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2015 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

Final data reported to ArboNET
In 2015, Zika was not a nationally notifiable disease in the United States. However, Zika cases could be reported to ArboNET, the national surveillance system for arthropod-borne diseases. These are final 2015 data reported to ArboNET for Zika virus disease.

US States

  • 61 symptomatic Zika virus disease cases reported
    • 61 cases in travelers returning from affected areas
    • 0 cases acquired through presumed local mosquito-borne transmission
    • 0 cases acquired through other routes (e.g., sexual, laboratory, or blood borne transmission)

US Territories

  • 9 symptomatic Zika virus disease cases reported
    • 1 case in a traveler returning from an affected area
    • 8 cases acquired through presumed local mosquito-borne transmission
    • 0 cases acquired through other routes†

Footnotes
†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.

Cases by State and Territory

ARBONET Zika Travel Local Cases Map 2015

Laboratory-confirmed symptomatic Zika virus disease cases and presumptive viremic blood donors reported to ArboNET by states and territories— United States, 2015
Symptomatic disease cases*

(N=61)

Presumptive viremic blood donors†

(N=0)

States No. (%) No. (%)
Alabama 0 (0) 0 (0)
Arizona 0 (0) 0 (0)
Arkansas 2 (3) 0 (0)
California 13 (21) 0 (0)
Colorado 0 (0) 0 (0)
Connecticut 0 (0) 0 (0)
Delaware 0 (0) 0 (0)
District of Columbia 4 (7) 0 (0)
Florida 9 (15) 0 (0)
Georgia 1 (2) 0 (0)
Hawaii 4 (7) 0 (0)
Idaho 0 (0) 0 (0)
Illinois 0 (0) 0 (0)
Indiana 1 (2) 0 (0)
Iowa 0 (0) 0 (0)
Kansas 0 (0) 0 (0)
Kentucky 1 (2) 0 (0)
Louisiana 0 (0) 0 (0)
Maine 0 (0) 0 (0)
Maryland 2 (3) 0 (0)
Massachusetts 2 (3) 0 (0)
Michigan 0 (0) 0 (0)
Minnesota 1 (2) 0 (0)
Mississippi 0 (0) 0 (0)
Missouri 1 (2) 0 (0)
Montana 0 (0) 0 (0)
Nebraska 0 (0) 0 (0)
Nevada 0 (0) 0 (0)
New Hampshire 1 (2) 0 (0)
New Jersey 1 (2) 0 (0)
New Mexico 0 (0) 0 (0)
New York 3 (5) 0 (0)
North Carolina 0 (0) 0 (0)
North Dakota 0 (0) 0 (0)
Ohio 0 (0) 0 (0)
Oklahoma 0 (0) 0 (0)
Oregon 0 (0) 0 (0)
Pennsylvania 1 (2) 0 (0)
Rhode Island 1 (2) 0 (0)
South Carolina 0 (0) 0 (0)
South Dakota 0 (0) 0 (0)
Tennessee 0 (0) 0 (0)
Texas 8 (13) 0 (0)
Utah 1 (2) 0 (0)
Vermont 0 (0) 0 (0)
Virginia 4 (7) 0 (0)
Washington 0 (0) 0 (0)
West Virginia 0 (0) 0 (0)
Wisconsin 0 (0) 0 (0)
Wyoming 0 (0) 0 (0)
  Symptomatic disease cases*

                       (N=9)

Presumptive viremic blood donors                    

(N=0)

Territories No. (%) No. (%)
American Samoa 0 (0) 0 (0)
Puerto Rico 9 (100) 0 (0)
U.S. Virgin Islands 0 (0) 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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