The Caribbean island is currently under a level 4 advisory.
Due to a prevalence of COVID-19 cases in the area, the United States Centers for Disease Control, along with the US State Department, have advised that travelers stay away from Jamaica for the time being. To be more specific, both departments have raised their travel advisory levels, which determine how safe it is for travelers to visit the area in question. Jamaica, specifically Kingston, Montego Bay and Spanish Town have been raised to advisory level 4.
A level 4 advisory, in the context of the COVID-19 pandemic, means that there are dangerously high rates of COVID-19 cases in the area. An area with a level 4 advisory has had either at least 500 new cases per 100,000 people over the last 28 days or more than 500 cases overall if their population is smaller than 100,000. If a US citizen must travel to Jamaica for whatever reason, the CDC advises they be fully vaccinated. While the pandemic is the primary concern, however, it is not the only one; crime rates are also up in the aforementioned three areas of Jamaica, making commercial travel through them inadvisable.
Numerous frequent travel destinations are currently under a level 4 CDC advisory due to the pandemic or other causes. Those destinations include, but are not limited to, the Bahamas, the Virgin Islands, Puerto Rico, Guam, and Saint Lucia.