The plan involves various levels of threat, including one where zombie-ism turns out to be highly transmissible, with low human immunity. Disappointingly, it does not include any suggestions on how to tackle Zombie Economics, which seems a slightly more realistic threat. It does however, warn of “Chicken Zombies”, which are described as “the only proven class of zombies that actually exists” when aged hens are incompletely euthanized and dig their way out of their graves.
Pentagon planners are rather more creative than Hollywood scriptwriters, it seems, with the the subtypes of zombies they are prepared for including vegetarians, “zombie life forms originating from any cause but pose no direct threat to humans because they only eat plant life”. Symbiant-Induced Zombies by are also on the list, as are evil magic zombies, as opposed presumably to zombies produced through good magic and zombies from space.