A. A549 cells were transfected with 2 μg of poly(I:C) for 6 hrs and then infected with ZIKV (MOI=3) for 18 hrs (Pre-treatment) or infected with ZIKV first for 6 hrs and then transfected with poly(I:C) for 12 hrs (Post-treatment). Levels of ZIKVgenomic RNA were determined by qRT-PCR. Values are expressed as mean ± standard error. ***P<0.001 (Student's t-test), N=3 