It is not just these islands, 600 miles (965km) south-east of Miami, that are affected.

https://www.bbc.co.uk/news/world-latin-america-51035398

Since the disease first appeared off the Floridian coast in 2014, where it has now impacted 100,000 acres (40,500ha), it has made its way through the Caribbean into several countries including Jamaica, Belize, the US Virgin Islands and the Dominican Republic.