Noun
post-exposure prophylaxis (countable and uncountable, plural post-exposure prophylaxes)
(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.
Synonym: PEP
Rape victims should be informed of the option of post-exposure prophylaxis to prevent HIV, in addition to emergency contraception.
Post-exposure prophylaxis may be discontinued if the animal involved is a dog or cat that remains healthy..., WHO expert consultation on rabies: first report
Vaccine should be used in all circumstances for postexposure prophylaxis except in infants less than 1 year of age., Viral Hepatitis in Children: Unique Features and Opportunities