A medical doctor by profession, Horace Anthony Chang, was appointed Medical Officer of Health for the parish of Trelawny, 1977. He, along with a team of doctors pioneered the development of a modern Public Health System for Jamaicans. This included the compulsory immunization of young children and the establishment of Type1, 2 and 3 Clinics in the parish. include, Stadium Gardens 2 & 3, Country Club 2, Palms of Portmore, Westmeade Willows, Hills of Boscobel and Luana Gardens. Meanwhile the Squatter Settlements Programme was upgraded with the construction of infrastructure such as roads, water and the installation of electricity with over 9,000 residents receiving certificates of title.