"After discussing what a pain in the ass recovery will be, his father and I have decided to pull the plug."
Survivors of the sleeping disease suffered horrifying behavioral problems for the rest of their lives, becoming excessively violent and -- regardless of gender -- somewhat rapey. On top of all this, they became emotionally indifferent, unable to recognize, for example, the beauty of art. Ten years after the epidemic struck, new cases suddenly stopped appearing, its only legacy being the alien clones it left behind.
Nearly a century later, doctors still don't know what the hell was going on there, although they realize it was some kind of brain thing. One hypothesis is that the bacteria that caused the sore throat triggered an immune response that also destroyed parts of the brain, but many scientists still think a virus is the more likely culprit.
Seems a little lazy, Science.
In the meantime, the occasional case still crops up, to the scratching of many heads. Now try not to think about this the next time you get a cold, you poor bastard.