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Volume 23, Number 5—May 2017

Estimated Incubation Period for Zika Virus Disease

Elisabeth R. Krow-Lucal, Brad J. Biggerstaff, and J. Erin StaplesComments to Author 
Author affiliations: Centers for Disease Control and Prevention, Atlanta, Georgia, USA (E.R. Krow-Lucal); Centers for Disease Control and Prevention, Fort Collins, Colorado, USA (E.R. Krow-Lucal, B.J. Biggerstaff, J.E. Staples)

Main Article


Demographics, travel data, and laboratory testing results for Zika virus disease patients, United States, January 1, 2015, through June 23, 2016

Patient characteristic All cases, no. (%), n = 197* Confirmed cases, no. (%), n = 79†
Age, y
0–19 19 (10) 10 (13)
20–39 71 (36) 29 (37)
40–59 79 (40) 32 (40)
>60 27 (14) 7 (9)
1 (<1)
1 (1)
M 77 (39) 26 (33)
F 119 (60) 52 (66)
1 (1)
1 (1)
Yes 11 (6) 2 (3)
No 161 (82) 60 (76)
25 (13)
17 (22)
Travel duration, d
<7 24 (12) 15 (19)
7–13 88 (45) 64 (81)
14–20 31 (16) 0
21–27 12 (6) 0
≥28 42 (21) 0

*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.

Main Article

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Page updated: April 14, 2017
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The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.