New twice-yearly shot to prevent HIV achieves 100% success rate in late-stage trial
Lenacapavir, a twice-yearly HIV prevention shot, protected every single one of 2,134 women who received it in a late-stage trial across South Africa and Uganda — a 100% efficacy result so striking that monitors ended the blinded phase early. The breakthrough matters because daily prevention pills, while powerful in theory, often falter in real life: stigma, forgotten doses, and disrupted routines all chip away at protection. Two clinic visits a year, by contrast, means a full year of coverage. The remaining hurdle is access, with advocates pressing manufacturer Gilead to license generic versions for the regions hardest hit. If that happens, a tool this effective could reshape the global push to end the HIV epidemic by 2030.









