Which statement regarding allergic contact dermatitis (ACD) is NOT correct?

Allergic contact dermatitis (ACD) is fundamentally characterized by a T cell-mediated delayed hypersensitivity reaction, which means that a person does not exhibit immediate symptoms upon first exposure to the allergen but will develop a reaction upon subsequent exposures. This reaction typically manifests within 24 to 48 hours after contact with the allergenic substance, which aligns with how the immune response is activated and takes time to develop.

The statement about ACD associated with alcohol-based hand rubs being quite common is not accurate. While it is true that hand hygiene practices can lead to skin irritation or sensitization, the primary ingredient in alcohol-based hand rubs is alcohol, which does not typically cause ACD. Most individuals do not develop a true allergic reaction to the alcohol itself, although other ingredients added to these products, like fragrances or preservatives, may potentially cause reactions in susceptible individuals. Therefore, the correct answer identifies a mischaracterization of the commonality of ACD in relation to alcohol-based hand rubs.