Lead exposure can occur through inhalation, ingestion, and which other route?

Lead exposure can indeed occur through absorption through the skin. This route of exposure is significant because lead, being a heavy metal, can penetrate the skin barrier to some extent, particularly if it is in a certain form, such as lead dust or lead-containing paint that has been worn down or is in a state of deterioration.

In households or work environments where lead is present, skin exposure can happen inadvertently when handling contaminated materials or surfaces. This makes it crucial for individuals working in environments with potential lead contamination to utilize protective equipment, like gloves and long-sleeved clothing, to minimize direct skin contact.

The other options do not represent standard routes of lead exposure. Direct injection is not a common method for lead exposure in everyday environments, and fumigation and burning relate more to methods of pest control or material disposal rather than direct exposure to lead. Understanding the various routes of exposure, including dermal absorption, aids in implementing proper safety protocols to prevent lead poisoning.