I've often thought of vampirism as the result of an improperly worded curse - a programming error, if you will.
If you want to curse someone's whole family, for example, say "I curse you and your sons", don't get poetic and say "I curse you and all who share your blood". If you want someone to suffer and die, be sure to specify that it should be in that order.
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!