Lancet 2013;doi:10.1016/S0140-6736(13)61127-7A team of researchers from Thailand and the US has shown for the first time that tenofovir can help prevent HIV in injecting drug users. Daily prophylaxis cut incidence by about half in a placebo controlled trial of 2413 drug users attending treatment clinics in Bangkok (0.35 v 0.68 per 100 person years;[...]











































