Get ready. Here it comes. Scientists hypothesize that a parasitic disease known as toxoplasmosis can impair your ability to safely operate a motor vehicle. Of course, since money could be made here, Illinois' crack legislature is probably already thinking about how to criminalize this in the Illinois Vehicle Code to make you safer!
Just think, the person driving down the road next to you could be under the influence of a tiny parasite and cause a crash. I can see Illinois State Troopers out with medical test kits, DUI (Driving Under Infection) Roadblocks set up near hospitals (where else are you going to go with a parasite?). Brilliant! Can't wait.