Local mosquito-borne transmission of Zika virus - Miami - Dade and Broward counties, Florida, June-August 2016.

First report on Zika virus infections in the U.S., tracing the area of infection to a specific square mile, creating a buffer zone around the area, targeting it for spraying and mosquito collection, intervention, mass screening and testing. Nevertheless the disease became widespread. Digital facsimile from cdc.gov at this link.

(Thanks to Juan Weiss for this reference and its interpretation.)