In the True Blood episode Death is Not the End, Arlene is mortally wounded. Sookie seeks to get a vampire to heal her, but she's oddly particular. She demands a healthy (non-hep-v infected) provide Arlene blood. This seems weird to me, since
Arlene's already infected at this point,
and as far as I can recall hep-v infected vampire blood doesn't affect humans differently.
Why did Sookie demand non-hep-v infected blood?