Yeztugo, approved by the FDA, was highly effective in two randomized trials. It costs $28,218 per year, and people have to be HIV-negative to get it.

WASHINGTON — The U.S. has approved the world’s only twice-a-year shot to prevent HIV, the first step in an anticipated global rollout that could protect millions – although it’s unclear how many in the U.S. and abroad will get access to the powerful new option.