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You quoted this in your article, "Just imagine what this would translate to: sick people being redirected to a hair stylist instead of a medical doctor (URL redirection)"

This actually happens in the animal kingdom. Toxoplasmi gondii, a parasite that infects cats, mice, rats and humans, redirects mice and rats to cats to be eaten by them to finish it's replication cycle.

"T. gondii infections have the ability to change the behavior of rats and mice, making them drawn to, rather than fearful of, the scent of cats. This effect is advantageous to the parasite, which will be able to sexually reproduce if its host is eaten by a cat. The infection is widespread in the brain, with more cysts targeting the parts of the brain corresponding to fear. The widespread nature of the infection causes many previously unnoticed symptoms in the rats."

-- http://en.wikipedia.org/wiki/Toxoplasma_gondii

I believe there is a similar thing among insects. No definitive word on the topic for humans for physical agents, but one could make a pretty good case for cultural meme viruses and trojans.