the uwi harp is also responsible for continuous updating of the universitys hivaids policy and for facilitating research on the impact and control of the epidemic in the region haiti is low income for example and guyana is lowermiddle income barbados belize dominica grenada st kitts and nevis st lucia and trinidad and tobago are all defined as uppermiddle income and yet vary greatly in their ability to invest national resources in public health table shows the public health expenditure as a percentage of gdp for selected caribbean countries