No, it's not a virus that turns humans into vampires although that would be terrifying and cool at the same time, if the vampires get superpowers. But the vampire part is just an analogy used to describe the behavior of a particular bacteriophage which latches itself onto the 'neck' of another bacteriophage and leaving what looked like bite marks where its tendrils had been attached.
The bacteriophage, dubbed MiniFlayer, was first discovered by Tagide deCarvalho, the Assistant Director of the College of Natural and Mathematical Sciences at the University of Maryland. At the time, she was supervising an undergraduate class wherein two students, Jenell Lewis and Hira Ahmed, had isolated and named their phage MindFlayer. However, when the genome sequencing turned out some odd and perplexing results, suggesting a contamination, deCarvalho looked at it, and found that there wasn't one phage, but two.
Bacteriophages usually infect bacteria in order to replicate themselves, but MiniFlayer had lost that ability, so instead, it found another method of reproducing through hijacking another virus' genetic machinery. DeCarvalho and her collaborator Ivan Erill have published a paper describing what they have observed, but they also hope that some other researchers who use a different form of electron microscopy could help illuminate what exactly is going on between MiniFlayer and MindFlayer.
(Image credit: Tagide deCarvalho/University of Maryland)