>>12524595That's not the complicated part. That's easy enough to do and it doesn't take long. The trouble can be viewed from tangible treatments to best case treatments 1. selectively taking out the immune system without the other problems caused by chemotherapeutics 2. selectively taking out only the particular problematic cells 3. selectively reverting the immune system 4. selectively reverting only the problematic cells.
Those numbers aren't indicative of timelines or anything, they're all being explored simultaneously. Our body grows very easily Anon, the difficulty is killing (or suppressing) only what we want to kill (as is the case for almost all medicines you look at).