Unfortunately, the drug that prevents HIV infection, lenacapavir, is currently unaffordable at $42,250 for the first year. If it were sold by Gilead for $40 per year, it would still yield them a 30% profit. But I guess that’s not how capitalism works.

https://www.nature.com/articles/d41586-024-02493-4

Stunning trial shows twice-yearly shots can prevent HIV infection

Injections of the drug lenacapavir protected sexually active women and girls in Africa from the virus.

Lenacapavir - Wikipedia