One combination of drugs (marketed as PrEP) can reduce the risk of HIV infection by 99% in some instances, but it is not widely used.

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PrEP can reduce the risk of HIV infection by 99% in some instances, but it is expensive. Consequently, many people who would benefit from taking it cannot afford it. In Africa, where PrEP adoption could turn the tide in the global battle against HIV, cost is just one barrier preventing widespread PrEP adoption. Obstacles include lack of knowledge about PrEP (even among some health care workers, PrEP's potential is not fully understood); low availability; and the stigma surrounding HIV.

One Combination of Drugs (Marketed as PrEP) Can Reduce the Risk