Asked by: Anon
Last November, a drug called Truvada made headlines following trial results suggesting it can reduce the risk of HIV infection by around 50 per cent. The drug combines two anti-viral compounds and is already used to treat patients after they’ve become HIV positive.
However, scientists say more work is needed to confirm the findings, and even if the drug does prove helpful, it remains too expensive for use by many high-risk groups.
*According to UNAIDS (http://www.unaids.org/en/resources/fact-sheet)
Get more fascinating Q&As from BBC Focus magazine by following @sciencefocusQA