PrEP vs. PEP?

PrEP (pre-exposure prophylaxis) and PEP (post-exposure prophylaxis) both prevent HIV, but what's the difference? Watch this short animated video to find out!

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TRANSCRIPT:
PrEP and PEP...what’s the difference? Both protect against HIV! PrEP (pre-exposure prophylaxis) is like birth control but for HIV. PrEP is taken every day. PrEP provides ongoing protection against HIV. PEP (post-exposure prophylaxis) must begin within 72 hours of possible exposure to HIV and be continued for 28 days. PEP is intended for emergency situations only. Both require a prescription from a healthcare provider.

[needgears]

Something important to point out about what is shown in the video: "must begin with 72 hours of possible exposure to hiv."
It's a race against time actually, because the faster you take the PEP the better. The period of time goes from 2 hours up to the limit of 72 hours after the exposure.