Figure 1.

Maps showing the reported occurrence of Aedes aegypti by county between 1 January 1995 and March 2016 in the United States. Reported occurrence from 1 January 1995 through 1999 (A), from 1 January 1995 through 2004 (B), from 1 January 1995 through 2009 (C), and from 1 January 1995 through March 2016 (D), representing the best knowledge of the current distribution of this mosquito based on collection records. Counties shown in white had no reported Ae. aegypti presence records within the specified time period. Counties shown in yellow had Ae. aegypti presence records for 1 year within the specified time period, those shown in orange had 2 years of presence records within the specified time period, and those shown in red had ≥3 years of presence records within the specified time period. Adapted from Hahn et al [42].