Consider all sexual partners to be infected with the HIV virus. Do not drink beverages with ice. Do not eat dairy products unless you know they have been pasteurised. Do not share needles with anyone. Do not swim in fresh water unless you are certain that is safe to do so.
Salt water is usually safer.
Mosquito-nets may also protect against insect bites that transmit other diseases and also from Vampire bats. Iodine tablets and water filters to purify water if bottled water is not available. Sunblock cream, sunglasses, hat. Please discuss your travel health requirements with your regular GP or practice nurse.