The head of the Caribbean Public Health Authority just declared this virus an epidemic throughout the Caribbean.
I heard of it when I was in St. Lucia in February. But at that point it had only been reported in St. Martin. Then cases were confirmed in Antigua, Anguilla, Aruba, Dominica, Guadeloupe, Martinique, St. Bart's, St. Lucia, and a few more islands. More than 4000 cases already in 14 islands.
Symptoms include a fever and aches and sometimes a nasty looking rash and skin swelling and discoloration. Aches can persist for months. No deaths as from dengue fever, but still quite serious.