Short for “pre-exposure prophylaxis.” PrEP is an HIV-prevention strategy in which HIV-negative people take a pill once a day to reduce their risk of HIV infection. PrEP must be taken for at least 7 days before exposure to HIV to reach optimal levels of protection against the virus.
Procedure used to collect tissue or fluids from the oral cavity, or mouth by rubbing the gums or inside the cheek to obtain a sample. These types of swabs are generally used for DNA testing, medical diagnosis, and drug testing.
Non-penetrative sex or outercourse, usually involving direct penis-to-penis contact.
Either of the two oval organs that produce sperm in men and other male mammals, enclosed in the scrotum behind the penis.
Body Mass Index (BMI) is a person's weight in kilograms divided by the square of height in meters. A high BMI can be an indicator of high body fatness. BMI can be used to screen for weight categories that may lead to health problems but it is not diagnostic of the body fatness or health of an individual.