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Centers for Disease Control and Prevention
Zika virus disease update
Dr Susan Hills
Arboviral Diseases Branch
September 26, 2016
Laboratory-confirmed Zika virus disease cases reported to ArboNET
by states — United States, 2015–2016 (as of Sept 21)
 Overall 3,358 Zika virus disease cases
– Travel-associated cases: 3,314
– Locally acquired mosquito-borne cases: 43
– Laboratory acquired cases: 1
 Among the 3,358 cases
– Sexually transmitted: 28
– Guillain-Barré syndrome: 8
Laboratory-confirmed Zika virus disease cases reported to ArboNET
by territories — United States, 2015–2016 (as of Sept 21)
 Overall 19,777 Zika virus disease cases
– Locally-acquired cases: 19,706
– Travel-associated cases: 71
 Among the 19,777 cases
– Guillain-Barré syndrome: 37
State of residence for reported Zika virus disease cases —
U.S. states, Jan–Jul 2016 (as of Sept 7)
State
(N=2,382)
NY
558 (23%)
FL
483 (20%)
CA
147 (6%)
TX
117 (5%)
NJ
90 (4%)
PA
74 (3%)
Month of illness onset for reported Zika virus disease cases —
U.S. states, Jan-Jul 2016 (as of Sept 7)
Number of cases
1000
Travel-associated (n=2,354)*
800
Locally-acquired (n=28)
600
400
200
0
Jan
Feb
Mar
Apr
May
Jun
Month of illness onset
*Travelers returning from affected areas or their sexual contacts
Jul
Age group for reported Zika virus disease cases —
U.S. states, Jan-Jul 2016 (N=2,382)
600
Number of cases
500
400
300
200
100
0
<10
10–19
20–29 30–39 40–49
Age group (years)
50–59
≥60
Region where reported U.S. travel-associated Zika virus
disease cases were acquired, Jan–Jul 2016*
Region
Percent
Caribbean
65%
Central America
18%
South America
9%
North America
Southeast Asia and Pacific
Islands
5%
<1%
*10 persons traveled to >1 region; No direct travel and unknown not listed (<3%)
Zika virus reports to PAHO from countries and territories
in the Americas
 Over past 2–4 weeks, most countries have reported a decreasing
trend in the numbers of Zika virus disease cases
– Unclear how much may be due to changes or delays in reporting
 Over the full course of the outbreak in 2015–2016
– 15 countries or territories have reported confirmed cases of
congenital syndrome associated with Zika virus infection
– 7 countries or territories have reported laboratory-confirmed
Guillain-Barre syndrome cases associated with Zika virus infection