"Phoebe Truffeau, Ph.D. (Epidemiologist): The only two untreatable rabies-type viruses were the African strains Mokola and Duvenhage, prior to the identification of the Rant serotype."
Finally the circle story shown at the beginning is starting to make sense. Rant had unintentionally created a super strain of rabies that oddly enough became popular amongst teens. The early symptoms of rabies were that of a stereotypical rebellious teenager; anger, rebellion, hyperactivity, and hypersensitivity.
"Toni Wiedlin: Without exception, every kid swears she or he was infected by Rant Casey or Echo Lawrence. Everyone wants to feel special-attain a special status among their peers"
This shows how rabies had become popular. With this new information i as the reader was left to make the choice whether Rant Casey was a odd genius, or a villain. Personally, i like the odd genius. Some of the ideas that Rant thinks of are just plain brilliant, like the easter egg stink bombs.
ps: west, all my quotes are spread out between Rant #8 -Rant #1