To have a dog or some small animal jump over your open grave.
To be a Christian apostate. (If this were true there would be tons and tons of vampires. Probably just wishful thinking by those who really don't understand what being a christian means.)
To curse God and drink blood. (Was good enough for Count Dracula)
To be the child of a vampire.
To be visited by a succubus (or incubus) or have relations with somebody like Courtesan Phillipa
To drink the blood of a real vampire. (What happened to Wilhelmina Harker)
To be bitten by a real vampire
To be repeatably bitten and weakened by a real vampire and then die.
