Vampiric watermelons are a well-known phenomenon here in Balkans, the home of vampirism. But worry not, we also have fool-proof methods of warding against vampires.
Wikipedia wrote:In order to ward of the threat of vampires and disease, twin brothers would yoke twin oxen to a plow and make a furrow with it around their village. An egg would be broken and a nail driven into the floor beneath the bier of the house of a recently deceased person. Two or three elderly women would attend the cemetery the evening after the funeral and stick five hawthorn pegs or old knives into the grave: one at the position of the deceased's chest, and the other four at the positions of his arms and legs. Other texts maintain that running backwards uphill with a lit candle and a turtle would ward off a stalking vampire. Alternately, they may surround the grave with a red woolen thread, ignite the thread, and wait until it was burnt up.[37] If a noise was heard at night and suspected to be made by a vampire sneaking around someone's house, one would shout "Come tomorrow, and I will give you some salt," or "Go, pal, get some fish, and come back."