[quote=@Halvtand]
Has this been explored somewhere? I like it.
[/quote]
Old school D&D stuff. Most of the vampire lore we have like the 'horde of rats' was made up by Bram Stroker on the fly for creep factor. 
I was using the drinking of holy water and prayer in church like an ICU for magical disease. Basically each day spent fasting in church in prayer and fasting allows for a new chance to resist the transformation.