42.6% of medication poisoning to children <6 years old

From the January 13, 2006, MMWR an abstract from the NEISS-AIP identified that in 2002 35 children less than 4 years old died from unintentional medication poisoning. Pharmaceuticals accounted for 1.336,209 unintentional exposures. of which 42.6% were in children < 65 years of age. Why can't we prevent these exposures? Isn't this a role for local health departments? It seems we should be able to prevent 99+% of these exposures. Is too hard for put child proof locks on cupboards and store medicines in them?