Re: HCV relapse. I don't get your point.
If a person is deemed cured (SVR = undetectable at treatment end plus 6 months), how could the virus have more of a chance to rebound based on the precise treatment protocol that got the immune system to SVR in the first place? In other words, if you are undetectable at 6 months post-treatment, the overwhelming odds are that you will never be positive for that particular HCV genotype again.
6 months is a long time to rebound; thus, the reason it is the gold standard as Dewophile mentioned. IMO, the immune system doesn't give a damn how it won.
"[It's] time for the human race to enter the solar system." - Dan
Quayle