The shot made by Gilead Sciences nearly eliminated new infections in two groundbreaking studies of people at high risk, better than daily preventive pills they can forget to take.

The launch of the injection faces potential threats, including the Trump administration's proposed cuts to federal funding for HIV prevention efforts.

Lenacapavir was nearly 100 per cent effective in preventing HIV in clinical trials.

The shot made by Gilead Sciences nearly eliminated new infections in two groundbreaking studies of people at high risk, better than daily preventive pills they can forget to take.