Fig. 4
Factors which co-shape the spatiotemporal risk of local ZIKV transmission in three different regions in the contiguous US. Columns from left to right represent a Miami-Dade, Florida; b Cameron, Texas; and c New York City, New York. Row 1 shows the average daily number of imported ZIKV infections. Note that for Cameron, Texas, the scale on the y-axis is different than that of Miami-Dade, Florida, and NYC, New York. Row 2 shows the average number of imported ZIKV infections that pass through the socioeconomic filter pe and reside in areas potentially exposed to mosquitoes. Row 3 shows the basic reproduction number (weekly average) calculated based on the ZIKV transmission model. Gray-shaded time windows indicate when the basic reproduction number R0 > 1 and sustainable ZIKV transmission is possible. Row 4 shows the expected daily number of ZIKV introductions with the red-shaded time window indicating the estimated time of local ZIKV transmission based on phylogenetic analysis [35]. Row 5 shows the average cumulative number of local ZIKV transmission events since January 1, 2015