I know what you mean, kinda. The only two asthmatic children I knew, were my brother and myself.
"I know what you mean, kinda"
Sorry, what I left out were the words "parents of" as in the parents of everyone I knew and went to school with while growing up, smoked. Yet none of them had asthma. Not a one.
I really believe it's genetic. I understand that smoking around asthmatics is harmful. But I find it hard to believe that parents' or grandparents' smoking causes kids to have asthma. One of my kids is asthmatic and - surprise! - so was his grandmother.