Think of all the trouble that computer hackers cause. Now imagine what DNA hackers could do. In the future, DNA hackers won't sneak viruses into your laptop and crash websites. Instead, they'll sneak viruses into your body and crash you, and maybe billions of other people, too. They'll do this by designing DNA sequences that code for new, never-before-seen, living viruses that spread from person to person as easily as measles, and that kill (or sicken) as inevitably as rabies. Truly monstrous hackers will ensure your doctor cannot help you fight the virus, by engineering it so that off-the-shelf medicines and vaccines are ineffective. [Subscription Required]