This short video from http://www.whatisprep.org/ offers a comprehensive overview of PrEP.
IMPORTANT: The video discusses full protection being achieved after 1 week. Please note that the current recommendation for cis-women using PrEP is not reflected in the video. For cis-women, current evidence tells us that PrEP does not reach maximum protection until someone has been taking it for 3 weeks. The makers of the video are updating it and a revised version should be available later this year. When it is available, we will update it here.
Text on this page adapted from materials at the Centers for Disease Control (CDC) website.