Researchers Announce a New Vaccine that Could Cut Risk of HIV Infection by 30%

The vaccine trial, which was funded by the US army, involved a combination of two vaccines that individually had proved ineffective.

The World Health Organisation says it offers the promise of a safe vaccine eventually becoming available for people around the world.

While the media loves a big story, these results were underwhelming. Although they were "statistically significant," it is way too early to declare success. A simple look at the numbers is more sobering: after vaccinating 16,000 people, there were 23 fewer new infections in patients receiving the vaccine (51 cases versus 74 cases). If one additional patient who received the vaccine became infected (52 instead of 51) the results would no longer be "statistically significant."