No. As you can appreciate, there are tremendous challenges in the development of a vaccine against a retrovirus. One of the key concerns is that you don't want to actually stimulate... Since the action of the retrovirus is to create a challenge for the immune system, you don't want to actually recreate a challenge to the immune system in otherwise healthy people.
With the complexity of the vaccine, as we've seen in multiple clinical trials, they've been very challenged, and even the one that has some promise still had very marginal benefit. The issue now is finding good models for vaccines that might have the prospect of working. There have been multiple trials that have not worked well, and it has not been about manufacturing; it has been about the basic vaccine itself.