Perhaps, for children with asthma, it's what's happening in their home, or perhaps they live close to a freeway with major air pollution that triggers their asthma.
おそらく 喘息児たちについて言えば 自宅の環境が影響していたり 大気汚染の酷い高速道路の 近くに住んでいて それが喘息の原因なのかもしれません