This is from the VisitJamaica site:
The pre-testing requirement described above is applicable to persons in this category if they are residents of locations designated as high risk by the Jamaican health authorities. The current list of high risk locations include the countries of Brazil, Dominican Republic, Mexico and United States of America (USA). Note that based on health screening and risk assessment on arrival, persons may still be required to be tested at the airport or designated facility, if, for example, they are exhibiting symptoms or belong to a high risk group despite presenting a negative COVID-19 PCR test certificate. In this case, they would await their test result in their hotel room.
If the test is negative, they would leave the confines of their hotel room and continue their stay in Jamaica under the “Stay in Resilient Corridor” control measure.
If the result of the test is positive, they would be isolated either at the hotel/resort or in a government facility as determined by the health authorities.
Persons not required to be tested on arrival will be allowed to go to their hotel/resort under the “Stay in Resilient Corridor” measure.