Rockhillmanor: This came from your post: "The first reported case involved a 3.5 year old girl whose body, bedclothes and bedding were sprayed each night for two weeks with an insect repellent containing 15 percent Deet (12). Since then, five additional cases of toxic encephalopathy have been temporally associated with the use of Deet products in children, all of whom were females (Edwards and Johnson, 1987; de Garbino et al., 1983; Heick et al., 1980; Roland et al., 1985; Zadikoff, 1979)".
How many spray DEET on body, bedclothes, bedding for two weeks with a 3-1/2 year old? Yes, I probably would get sick, too. :)
This report was old - from the -70s and 80s. It states it is "temporally associated". It wasn't a given at that time. This was a very small sampling from millions who use it.
Did you read my link to a lot more recent report from the EPA that stated it was safe?