It is herefore suggested that vampirism be product of additional processes besides (as far as I know) godly curses.
The two that I like from popular culture are the
A) Lumley Vampires - Symbiotic Parasitism
B) Rice Vampires - Spiritual Congruence
A) The parasite be a seperate creature or entity that must take over a suitable host, typically humanoid, but really any living creature would do. Any creature in symbiosis with the parasite is basically now a vampire, so it has vampire behaviors and such, like farming people, eating people, etc.. These vampires gain power with age. They transmit vampirism by giving their victims a piece of their parasite, or parasite material etc. A vampire must be at such an age to be able to make new vampires, with limits on new vampire production as regenerating parts of ones parasite takes time, food, etc. New vampires would be in thrall to their creator, essentially they would be their henchmen untill such time when they are old enough to branch away from their master (assuming of course their master didn't eat them, or an angry mob didn't party with them..).
B)These vampires are first made when an angry ghost, obsessed with the blood of sentient beings, attacks and obsorbs itself into the blood of an individual who somehow pissed it off. I guess it would be like possession, except the individual isn't possessed, it's the blood that is possessed, so it's the blood that drives the vampirism behavior and traits, and the blood that, when transfered to a victim, makes them a vampire also.
Just a couple of suggestions. Thanks.
~Xender