C. A549 cells (MOI=2) or Human primary fetal astrocytes (HFA) (MOI=5) were infected with ZIKV for 24 hrs and 48 hrs respectively, after which IFN-α (100 U/mL) was added for 2 hrs. Cells were then fixed and processed for indirect immunofluorescence. Images were acquired on a spinning disk confocal microscope with a 40X objective. Dashed line white circles indicated ZIKV-infected cells. Representative panels are shown. The experiment was repeated two times. 