Via the Public Health Agency of Canada: Chikungunya in Saint Martin/Sint Maarten, Martinique and Guadeloupe - Travel Health Notice. Excerpt:
There have been confirmed cases of chikungunya on the Caribbean islands of Saint Martin/Sint Maarten, Martinique and Guadeloupe. These cases mark the first time that locally acquired transmission of chikungunya has been detected in the Region of the Americas. Previously, only imported cases have been reported in the Americas.
The Public Health Agency of Canada recommends that travellers protect themselves from mosquito bites when travelling in Saint Martin, Sint Maarten, Martinique and Guadeloupe.
Chikungunya is a disease caused by the chikungunya virus which typically causes fever along with an arthritis-like pain in the joints and a rash. It is spread to humans through the bite of an infected mosquito.
Additional information about these cases is available on the Pan American Health Organization’s website.
And still more information on the spread of the disease is available from FluTrackers.