Fig. 4

ZIKV RNA copy numbers of the simulated clinical human saliva, urine and serum specimens that tested positive by qRT-PCR according to the infectious virus titer (n = 10). The dashed line indicates the detection limit of qRT-PCR. The error bars indicate the standard deviation of the viral RNA copy numbers from the mean. Open circle, positive by qRT-PCR only; filled circle, positive by both qRT-PCR and RT-LAMP