[Critter]

My response was to an assertion that cigarette smoke is to blame for kids with allergies and asthma.

[Ditter]

Kids have allergies if they inherit the genes from their parents. The children who have inherited allergy genes will become allergic to some of the things to which they are exposed.
Why one child developes an allergy to the family cat, or mold & another becomes allergic to cigarette smoke, when both have been exposed to both allergens is something I doubt if even a Dr could answer.

Why an allergen will give one person a headache & the same allergen will give another person asthma is a mystery to me. Just be happy if you do not have allergies to pass on to your kids.