That's the point of the biological analogue. To speak of the disease is to invoke it. I admit to a certain amount of ambivalence on this issue. I believe that there is some risk of turning a vulnerability into a problem by talking about it too much. There is an undeniable phenomenon of copy-catism in society.
Serial killers clump in time.
So do teen suicides. There is also a tendency in our society to glorify the perpetrator of a crime and stigmatize the victim. The computer virus is different from the natural virus. Now I make my living advising my clients on how to keep the computer safe, how to use it to protect its contents, and how to use it safely. I have a responsibility to them and to the public at large to understand the nature and size of this risk and to advise them accordingly.