Explain the term "secondary contamination" in the context of CBRN incidents.

Secondary contamination refers to the transfer of harmful substances or contamination from a contaminated individual or object to someone who has not been initially exposed. This process is particularly critical in CBRN incidents, where toxic chemical, biological, radiological, or nuclear agents can be present. It highlights the importance of containment measures in emergency response situations, as unprotected responders or bystanders can unknowingly become contaminated through physical contact or droplets that have transferred from a contaminated source.

For instance, if a medical personnel treats a victim who has been exposed to a hazardous agent without proper protective gear, they risk becoming a vector for spreading that contamination further. This emphasizes the need for decontamination protocols and the use of personal protective equipment (PPE) to prevent secondary contamination and ensure the safety of both responders and potential victims.