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何时需要PEP？

PEP must be started within 72 hours after a possible exposure. The sooner you start PEP, the better; every hour counts.

Starting PEP as soon as possible after a potential HIV exposure is important. Research has shown that PEP has little or no effect in preventing HIV infection if it is started later than 72 hours after HIV exposure.

If you’re prescribed PEP, you’ll need to take it once or twice daily for 28 days.