2018 Case Counts in the US

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Final data reported to ArboNET
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 final data reported to ArboNET for 2018.

US States

  • 74 Zika virus disease cases reported
    • 73 cases in travelers returning from affected areas
    • 0 cases acquired through presumed local mosquito-borne transmission
    • 1 case acquired through laboratory exposure; 0 cases acquired through sexual transmission

US Territories

  • 148 Zika virus disease cases reported
    • 1 cases in travelers returning from an affected area
    • 147 cases acquired through presumed local mosquito-borne transmission
    • 0 cases acquired through other routes

Footnotes
Excludes congenital disease cases.

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.

 

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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, 2018
Table 1.  Laboratory-confirmed symptomatic Zika virus disease cases and presumptive viremic blood donors reported to ArboNET by states and territories— United States, 2018
Symptomatic disease cases*(N=74) Presumptive viremic blood donors†(N=3)
States No. (%) No. (%)
Alabama 2 (3) 0 (60)
Arizona 2 (3) 0 (0)
California 25 (34) 0 (0)
Florida 14 (19) 2 (67)
Illinois 3 (4) 0 (0)
Maryland 2 (2) 0 (0)
Massachusetts 1 (1) 0 (0)
Minnesota 1 (1) 1 (33)
New Jersey 5 (7) 0 (0)
New York 8 (11) 0 (0)
North Carolina 3 (4) 0 (0)
Oregon 1 (1) 0 (0)
Texas 4 (5) 0 (0)
Utah 2 (3) 0 (0)
Virginia 1 (1) 0 (0)
  Symptomatic disease cases*(N=148) Presumptive viremic blood donors(N=0)
Territories No. (%) No. (%)
American Samoa 0 (0) 0 (0)
Puerto Rico 146 (99) 0 (0)
U.S. Virgin Islands 2 (1) 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.