Have found somes reports of what is termed a Ludverc from Hungary /Romanian lore. Which is usually bunched with the accounts of vampire mythology. However if viewed from a modern perspective could mean something quite different, when reviewing the accounts. Take a look at these examples
Where a ball of decending light, sometimes being described as a shaft of burning light from the sky. A being of light enters the house. Soon after the females becomes pregnant.
Similar reports of the phenomena, the being of light takes on the form of a dead spouse, deceased member of the community or those thought missing.
Report on an elder woman who sheds her skin to reveal a being of light, who causes people to pass out, one reference shows that blood was being taken from the “victim” and they woke during the procedure.
Children being born and didn’t look like a person, indeed looked like “the devils” who came at night. Children being taken from their beds at night.
Women who were pregnant suddenly despite being heavy, wake up in the woods not longer with baby, no mention of blood.
A report of a man, who woke up to find a strange short being cutting his kidney 0ut, but was unable to move.
A curious report of vampires from Mexico, Between July 1977 to Nov 1978. Over 40 reports of the same phenomena occurrence of people getting hit by red beams of light that burned their chests directed by what and I quote “Looked like a man in a diving suit carrying a pistol”. Blood tests conducted on the victims revealed abnormally low levels of hemoglobin. The chest area struck by the red light deteriorated over time.
In my opinion, these don’t sound much like vampire reports. They read like modern day what is termed “alien abduction phenomena.”