Which of the following is NOT an example of lead exposure?

The scenario involving contact with lead paint in perfectly sealed containers is not considered an example of lead exposure because exposure requires that lead particles enter the body through ingestion, inhalation, or skin contact. When lead paint is contained within sealed containers, there is no risk of the lead escaping into the environment where it could be inhaled or ingested, thereby eliminating the possibility of exposure.

In contrast, the other examples illustrate true exposure scenarios. Ingesting lead-contaminated toys, for instance, directly introduces lead into the body. Similarly, exposure to lead dust from renovation can occur when the dust becomes airborne, allowing for inhalation or settling on surfaces where it can be ingested. Drinking water from lead pipes can also lead to lead entering the body, making all those situations valid forms of lead exposure. The key element in the correct option is the lack of any mechanism that would allow lead to enter the body when the paint is safely contained.