A new HIV prevention drug, lenacapavir, shows 100% efficacy in clinical trials when injected every six months, with no infections reported among women in Uganda and South Africa. Initial results from a separate trial show 99% protection rates among men who have sex with men, transgender, and non-binary people. Gilead Sciences, the manufacturer, is under pressure to lower the current $42,000 annual treatment price and has signed licensing agreements with generic manufacturers to increase global access.