COMMON GROUND. “The origins of each virus are strikingly different: A computer virus is designed, whereas a biological virus evolves under pressure from natural selection. But what would happen if these origins are switched? Could hackers code for a super-virus, or a computer virus emerge out of the information “wilderness” and evolve over time? Apvrille and Lovet argued that both scenarios are possible.”
http://blogs.scientificamerican.com/observations/could-human-and-computer-viruses-merge-leaving-both-realms-vulnerable/