An experimental shot taken every other month is found to work better than daily pills to prevent HIV infection in women from an infected partner.
The drug, cabotegravir, was found to me 89 per cent more effective at preventing HIV infection that the Truvada pills.
The results are similar to those found in another study earlier this year, that also tested the shots versus daily pills in gay men.
Dr Anthony Fauci, the top infectious disease expert at the US National Institutes of Health, said the results are a “major, major advance”, adding “I don’t think we can overemphasize the importance of this study”.
In parts of the world, young women are twice as likely to get HIV than men.
The study involved more than 3,200 participants in seven African countries who were randomly assigned to get either the shots every two months or daily Truvada pills.