But blood is not the only sample to test.
In fact it may even be one of the less informative samples to test if trying to detect signs of a current or very recent infection. A lot of that being done in the Americas, and as a result, in laboratories worldwide, right now.
Urine has been shown to be positive for ZIKV RNA beyond 5 days, sometimes when blood is completely negative by highly sensitive polymerase chain reaction (PCR) methods.[1,2,3] Saliva has also been of use, but urine seems to outperform it for PCR purposes.
In particular - beyond 10 days in the study by Gourinat et al.
|From Emerging Infectious Diseases article,Vol. 21, No. 1, |
January 2015 Detection of Zika Virus in Urine.