From the Pan American Health Organization:, the shades darkening as the disease spreads [darkest colors equal the most recent spread]:
As the PAHO notes:
A downward trend of cases of Zika virus disease in Central and South America continues to occur while in most Caribbean countries and territories the trend continues to rise. This trend should be interpreted with caution due to delays in notification which may subsequently alter the trend of the previous 4 to 6 weeks.
It’s also nearing mid-winter in the Southern Hemisphere, and mosquitoes are less active as temperatures, while it’s neariong mid summer in the Caribbean.