Minister of Health Terrence Deyalsingh said this became necessary in order to prevent an outbreak of the virus in Trinidad and Tobago. The virus normally spreads in what is known as a jungle or sylvatic cycle, with transmission between mosquitoes and monkeys. It is common among red howler monkeys native to forests in the twin island republic.
Deyalsingh said while most citizens of are vaccinated against yellow fever from a very young age, there are still thousands of people who are yet to be immunized. The health minister added that the people most at risk of contracting yellow fever are those who go into the forests where infected monkeys may reside. He said it was, therefore, imperative that hikers, farmers, hunters and other people visiting or living near the forests be vaccinated.
Regional carrier Caribbean Airlines has advised passengers to liaise with travel agents for a list of vaccination requirements before their scheduled departure. The yellow fever virus is transmitted to humans by the bite of an infected mosquito. Yellow fever is diagnosed based on symptoms, physical findings, laboratory testing, and travel history, including the possibility of exposure to infected mosquitoes.