I think that this period time for prevention study will proof this concept about prevention packaged. Truvada has approved for PrEP and next study have to use Truvada for prevention package or not? This question should be asked from stakeholder. Some country, no policy provide PrEP within health coverage and people do not know about this. This is challenge for next study that will conduct there.
However, this situation not same as provide clean needle to IDUs. It is legal and challenge for researcher who need to comply with local policy in country, comply with protocol and comply with stakeholder view.
