We can't explain what we don't know. JMS never totally revealed what he meant when he said a cure would be found early, but that cure would not be what it appeared to be.
/forums/images/graemlins/confused.gif Your guess is as good as mine. There has been speculation that the cure would be shadow-based. So, at best, it would be a very 'pricey' cure.
We actually don't know what JMS had in mind, other than he did say the cure would be found early, and our heros would go renegade for some reason.