January 20, 2023
On the heels of Wednesday’s announcement from Janssen Pharmaceutical Company that the Mosaico HIV vaccine trial is ending for lack of efficacy, there’s much to learn and discuss.
Please join AVAC and the HIV Vaccine Trials Network (HVTN) for a webinar on January 25th at 9am PST/12pm EST/6pm CET. The webinar will include study investigators and community representatives as we all discuss the outcome of the Mosaico study, what these results mean and next steps. Register here.
The Mosaico study, also known as HVTN 706/HPX3002, was the third large-scale vaccine efficacy study to conclude early for non-efficacy since 2020. Uhambo/HVTN 702 and Imbokodo/HVTN 705 were stopped in 2020 and 2021 respectively. One large-scale, Phase 2b trial known as PrEPVacc is continuing, studying two vaccine regimens and two daily oral PrEP regimens (F/TAF and TDF/FTC) in men and women; expected completion in late 2024. In addition, several early phase trials using mRNA technology have launched. It’s a field in transition.
This latest announcement raises critical questions about the direction of the essential work to develop an HIV vaccine. Understanding the results of the Mosaico study is central to this task. A vaccine strategy is vital for a durable end to the epidemic but a clear path is not in sight, and new longer-acting PrEP options, which hold promise to bring the world closer to controlling the epidemic, add to the complexity, the opportunities and challenges for HIV vaccine development.
To help navigate all of this, see our updated resources on the issue:
We look forward to hearing from you on the 25th and working with you going forward.