@Sarkoz. There have been a spate of stories recently, thats true. But thats how the press works .... a story comes up that galvanises public opinion, and all of a sudden stories abound.
There have been 2, maybe 3 high profile stories of late, out of a global population of what, around 7 billion people? Seems unlikely to be the start of the zombie apocalypse, to me, although I suppose all apocalypes have to start somewhere......
The high profile reported cases differ in content too, and maybe motivation. On the one hand, we have the florida case - the attack and face-chewing incident. But was that attempted cannibalism or feral savagery induced by drugs?
Hallucination is a fairly specific term for a particular type of medical phenomenon linked to the visual brain, and through imaging techniques, is diffused across several areas of the brain, rather than just one localised area. Then you have the problem of just how you are imagining the virus is going to interact with the brain matter in order to create highly specific hallucinations as you describe - then you have to design a virus, or a delivery mechanism capable of crossing the blood- brain barrier.
All in all, far too sci-fi - worse, pretty implausible, I would have said. If you wanted a culprit to induce delusions, far better would be to concentrate on some sort of designer drug.......