PEP is effective in preventing HIV infection when it is taken correctly, but it is not 100% effective. The sooner PEP is started after a possible HIV exposure, the better. Every hour counts.
How well does PEP work?
Jul 2024 
Jul 2024 PEP is effective in preventing HIV infection when it is taken correctly, but it is not 100% effective. The sooner PEP is started after a possible HIV exposure, the better. Every hour counts.
