Which symptom is NOT typically associated with a chemical attack?

The presence of irritation of the eyes and throat, dizziness, and nausea is commonly noted in cases of chemical exposure, as these symptoms are directly related to the routes through which chemical agents affect the body. Chemical agents can cause irritative effects on mucous membranes, leading to eye and throat discomfort. Dizziness and nausea are also typical physiological responses to toxic agents due to their impact on the central nervous system and digestive tract.

In contrast, an increase in white blood cell count is not a direct symptom of a chemical attack, but rather a longer-term indicator of an immune response to infection or injury. While certain chemicals can impact the immune system eventually, they do not typically cause an acute increase in white blood cells at the onset of exposure. This makes the option of an increase in white blood cells the one that does not fit with the immediate symptoms commonly observed during a chemical attack.