Final answer:
The measure that you should NOT take to protect yourself during a CBRNE incident is to stay in a well-ventilated area.
Step-by-step explanation:
The measure that you should NOT take to protect yourself during a CBRNE incident is to stay in a well-ventilated area. While staying in a well-ventilated area is generally advisable for respiratory safety, it may not be effective in a CBRNE incident where there is a risk of chemical, biological, radiological, nuclear, or explosive materials. In such incidents, it is important to follow guidelines provided by authorities and emergency response organizations, which may include actions such as evacuating to a safe location, covering your nose and mouth with a mask, and seeking medical attention immediately if needed.