Asthma.. and everything else.
Asthma is a symptom and not a disease but has been included here simply to make it easy to find.
There are many medical studies published on asthma, very few of which focus on the cause and how it can be reversed without chemical intervention.
Other respiratory issues are mostly degenerative, permanent conditions. You should have no problem finding what you want but please contact us if you are looking for something specific.