Volume 23, Number 5—May 2017
Estimated Incubation Period for Zika Virus Disease
|Patient characteristic||All cases, no. (%), n = 197*||Confirmed cases, no. (%), n = 79†|
|0–19||19 (10)||10 (13)|
|20–39||71 (36)||29 (37)|
|40–59||79 (40)||32 (40)|
|>60||27 (14)||7 (9)|
|M||77 (39)||26 (33)|
|F||119 (60)||52 (66)|
|Yes||11 (6)||2 (3)|
|No||161 (82)||60 (76)|
|Travel duration, d|
|<7||24 (12)||15 (19)|
|7–13||88 (45)||64 (81)|
*Persons with Zika virus–like symptoms and positive results for Zika virus RNA by real-time reverse transcription PCR or positive results for Zika or dengue virus IgM and Zika virus plaque reduction neutralization test (PRNT) results >10 and Zika virus titer >4-fold higher than dengue virus titer.
†Persons who traveled <2 weeks, experienced Zika virus–like symptoms, and had positive Zika virus RNA results by real-time reverse transcription PCR or positive Zika or dengue virus IgM results and PRNT >10 and dengue PRNT <10.
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