A technique in behavior therapy in which the target patient is exposed to an anxiety source with the intention of helping him overcome it.

(medicine) A form of prevention, usually medication, taken after exposure (or probable exposure) to a pathogen, preventing development of disease after such exposure; especially, as against HIV.

plural of post-exposure prophylaxis

(medicine) A form of prevention, usually medication, that is taken before exposure to a pathogen, preventing development of disease after such exposure. Especially:

plural of mere exposure effect

(psychology) The phenomenon whereby people tend to develop a preference for something merely because they are familiar with it.