On behalf of clients traveling in near future, I’m reaching out to suppliers to inquire as to any possibility for an alternate plan and/or to determine how they plan to proceed. From what I’ve seen, each supplier is handling things differently depending on the country/region in which they do business and which client itineraries are affected. The quality suppliers I work with are monitoring things closely - and adjusting as necessary.
I’m recommending all clients watch the following sites and consider the facts in order to make a decision with which they are comfortable. The CDC's website is a great resource with content specific to address question around cancelling or postponing travel. The World Health Organization is also a good resource and has also been issuing daily updates about the spread of coronavirus. The State Department travel.state.gov is another good site for Travel Advisories for the most urgent threats to safety and security in specific countries. Regardless of where and when you are traveling, I always encourage clients to enroll in the Smart Traveler Enrollment Program (STEP) to receive Alerts and make it easier to locate you in an emergency.
CDC has a 3 level warning system for countries which is frequently updated and considered reliable when contemplating a destination - https://wwwnc.cdc.gov/travel/notices . Thus far the Caribbean and Mexico are considered safe.
Following are a few other articles you might find helpful.
Remember trip protection is always recommended industry wide and best protection when you need to cancel of your own volition.