The Ontario College of Family Physicians has released an international study, conducted over a 13 year period, saying that there is no evidence that certain pesticides are safer than others---rather, pesticides misconstrued as "safe" may simply have delayed effects on health.. Meanwhile, the Pesticide Action Network has compiled data from the Centers for Disease Control that shows that 100% of blood and urine samples, collected from 9,000 random people, showed residues of pesticides.

http://www.organicconsumers.org/foodsafety/pesticides051704.cfm