A significant difference between a single computer terminal virus and a connected computer (or network or Internet) virus is that a network virus has the ability to make copies of itself rather than just making miniature versions of itself.
This is meaningful simply because when electrical signals (say across a mutiple-computer hub network) are interrupted in series, a given network experiences a functionally metaphorical processing "seizure."
This electrical malfunctioning behavior is akin to the human system condition of nerve-reflex related Tourette syndrome. Tourette syndrome is an asymmetric neurological condition that creates a degenerative loss of motor control yielding strange body and speech fluctuations (or tics).
We do not want catalytic Internet viruses to create a sort of World Wide Web Tourette syndrome-like condition in the networked Information Age.
These system considerations reveal why media-themed Hollywood (USA) movies such as "Network" (1976) are intelligently symbolic of infrastructure coordination.
Are they printing movie posters on hemp/recycled paper yet?