Culture Bound Assumptions in Behavior Intention Models.] abstract - Many models of consumer behavior include fundamental assumptions which are rarely questioned.
PrEP is a course of HIV drugs taken by HIV negative people before sex to reduce the chance of getting HIV. Results in trials have been very successful, with PrEP significantly lowering the risk of becoming HIV positive and without major side effects.
Some people are using PrEP by getting NHS prescriptions for PEP. (PEP is where the NHS prescribes one month of HIV meds after a high risk exposure). Some doctors recommend patients buy generic drugs until the government decides whether PrEP will be available in the health system.