Immune System Computer viruses are the bane of anyone who uses a PC. The problem is compounded by the popularity of the Internet, which can carry viruses literally around the world, just as airplanes can transport human viruses. An IBM research team, however, is delivering an antidote to the pandemic of computer viruses with patented software that quickly identifies and offers solutions for known and new computer virus strains. If you're interested in this digital doctoring, find out how it works.