Final answer:
The majority of accidental poisonings occur at home, primarily affecting children under the age of 5 years due to their curious nature and the presence of toxic substances like lead in the environment.
Step-by-step explanation:
The majority of accidental poisonings happen at home to children under the age of 5 years. Children in this age group are naturally curious and may not be aware of the dangers posed by various substances. It is crucial to keep harmful products out of reach and to follow safe storage practices as per label instructions to prevent these accidents. The symptoms of lead poisoning, for instance, are serious and can include brain damage and even death. Thus, precautionary measures are essential, especially considering there are children with elevated blood lead levels that indicate lead exposure, a common home hazard.