Pediatric Asthma

Hey guys,
I'm not in the medical field, one of my friend needs this information
Sorry if this is a stupid question
Question: What is the age group of pediatric asthma? Up to what age an asthmatic patient may appeal that pediatric asthma?

It's a tricky question ... according to the literature you cite ... group of pediatric asthma age was 3-18 .... delicate than three years ... mainly because the airways are so tiny ... many respiratory infections like asthma reproduce the results ...

probably 2-12