What is the immediate response for someone showing signs of Mustard gas exposure?

The immediate response for someone showing signs of mustard gas exposure is to move them to fresh air without delay. Mustard gas, a chemical warfare agent, can cause severe respiratory damage, skin burns, and other serious health effects upon exposure. The priority is to remove the victim from the contaminated environment to reduce further inhalation of the toxic substance. Fresh air can help alleviate respiratory distress and minimize the absorption of the chemical through the lungs.

While other options might be relevant in different contexts or stages of treatment, they are not the immediate actions. For instance, providing water for rinsing is important for decontamination, but it would be ineffective if the individual is still in a contaminated area. Administering oxygen can be essential for treating respiratory distress, but it should come after the person is removed from the source of exposure. Starting CPR is critical if the victim is unresponsive and not breathing, but the initial focus must be on ensuring the individual is in a safe environment. Thus, moving to fresh air is the most crucial first step in managing mustard gas exposure.