If a contaminated individual leaves the hot zone without decontamination, what is the likely outcome?

• A. Nothing. All contaminants would be gone after the individual exited the hot zone.
• B. The contaminants would be transferred to other personnel or equipment.
• C. The individual would be treated for exposure but is no risk to others.
• D. There would be direct contamination of the warm zone.

Answer: (B)

The main idea here is that contamination can spread when someone exits a hot zone without proper decontamination. Contaminants cling to skin, clothing, and PPE, and as a person moves into the warmer areas, those residues can be deposited on other people, on shared tools, and on equipment. That creates secondary exposure pathways—other workers can come into contact with contaminants, or gear and surfaces can become contaminated and pass the residues along. Even if the individual will be treated for exposure, the risk to others remains until decontamination steps are completed.

This explains why the likely outcome is that contaminants would be transferred to other personnel or equipment. The other options don’t fit because contaminants don’t all disappear after exit, and while the person may receive treatment, they can still pose a risk to others without decontamination. Direct, immediate contamination of the warm zone can occur as a result of cross-contamination, but the broader and most direct consequence is the transfer to people and gear.