primary prevention pre-exposure prophylaxis http://homosaurus.org/v2/prep http://purl.bioontology.org/ontology/MESH/D065129 https://en.wikipedia.org/wiki/Pre-exposure_prophylaxis https://www.wikidata.org/wiki/Q7239230 Note that this term typically, but not always, refers to the specific use of antiviral drugs as a strategy for HIV/AIDS prevention. PrEP The use of drugs to prevent disease in people who have not yet been exposed to a disease-causing agent, usually a virus. The Ultimate LGBT Glossary: all your questions answered