"Every so often, a computer virus becomes more than just a novelty for anti-virus researchers and moves into the consciousness of the mass media, even if it’s not a grave threat. The recent Conficker outbreak is a fantastic example of this.
While only a small fraction of all PC users were infected with the worm, a great deal of media coverage was devoted to the outbreak. Any user affected by Conficker was likely already compromised by the time they heard about the threat, as users with infected systems were already not performing proper digital hygiene, such as keeping machines fully patched. The virus’s payload was not initially destructive, rather it contained an auto-updating routine that became even more sophisticated after April 1st." – Content courtesy of Celebrity Viruses Improve Security