Twice-yearly shot could help end AIDS: Study

The drug called lenacapavir is already sold under the brand name Sunlenca to treat HIV infections in the US, Canada, Europe and elsewhere

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MEXICO CITY: It's been called the closest the world has ever come to a vaccine against the AIDS virus.

The twice-yearly shot was 100% effective in preventing HIV infections in a study of women, and results published Wednesday show it worked nearly as well in men.

Drugmaker Gilead said it will allow cheap, generic versions to be sold in 120 poor countries with high HIV rates - mostly in Africa, Southeast Asia and the Caribbean.

But it has excluded nearly all of Latin America, where rates are far lower but increasing, sparking concern the world is missing a critical opportunity to stop the disease.

"This is so far superior to any other prevention method we have, that it's unprecedented," said Winnie Byanyima, executive director of UNAIDS. She credited Gilead for developing the drug, but said the world's ability to stop AIDS hinges on its use in at-risk countries.