Travelers who choose to have intimate contact with new partners are at increased risk for acquiring sexually transmitted diseases, including AIDS. The risk of developing an STD may be decreased by use of latex condoms and diaphragms with a spermicide.

AIDS, as well as other diseases, also may be transmitted by injections with unsterile, contaminated needles or by blood transfusions. For this reason, blood transfusion should only be performed in a medical emergency. The attending physician should be asked about HIV (AIDS) testing of the blood, or travelers may contact the local American Embassy about obtaining tested blood. In some cases, American expatriates or fellow travelers may be able to donate blood directly. Travelers should avoid injections from reusable needles and/or syringes unless there are life-threatening circumstances.