Johnson & Johnson and partners announced that the Imbokodo study, a large-scale HIV vaccine proof-of-concept trial also known as HVTN 705/ HPX2008, did not significantly reduce the overall risk of HIV acquisition among over 2,600 women in five sub-Saharan African countries. The Adenovirus26-based mosaic vaccine regimen was shown to be safe, but it did not meet pre-defined criteria for efficacy to warrant moving forward for longer follow-up. A companion study, the Phase III Mosaico trial, will continue.