The circles depict the top 100 cities to which Zika virus might be imported from current infected regions of Latin America and which have suitable habitat for Aedes aegypti or Aedes albopictus in the surrounding region. The size of the circle is the estimated relative risk. Solid red indicates the risk from A aegypti alone. Open circles indicate total risk from both species. The inset shows the status of south Florida, the Caribbean, and nearby areas in more detail.