From listening to Stanley Carmichael on the YouTube video, it sounds like memory recovery is pretty tricky. First, with age, more CCR5 receptors appear to form in the brain. This could be because of an increase in inflammation throughout the body that tends to occur with our immune histories. No doubt, older people have immune systems that are pulled further away from homeostasis.

Second, CCR5, and the homeostasis it confers on the immune system, seems to be involved with the correct segmenting of memories through correct pruning of neuronal connections as memories are made. With traumatic brain injury, CCR5 helps insure that Humpty-Dumpty gets put back together again the right way and thus memories are restored or not otherwise lost.

So for people who are not making new memories, where correct pruning is not involved, CCR5 may not restore old memories. However, perhaps your ability to make new memories will be restored if you take a CCR5 blocker. That would still be a huge improvement!

Those are some of the thought I had after listening to the video.