Zika virus RNA presence in serum, whole-blood and urine samples from six Israeli travellers symptomatic for Zika virus disease was examined. Whole-blood samples were positive for as late as 2 months (58 days) post-symptom onset, longer than for urine (26 days) and serum (3 days). These findings suggest the utility of whole blood in Zika infection diagnosis.
Lustig, Y., Mendelson, E., Paran, N., Melamed, S., & Schwartz, E. (2016). Detection of Zika virus RNA in whole blood of imported Zika virus disease cases up to 2 months after symptom onset, Israel, December 2015 to April 2016. Eurosurveillance, 21(26). https://doi.org/10.2807/1560-7917.ES.2016.21.26.30269