@irenea8
No one seems to be able to answer why I have so much (clear/white) mucus. Some specialists have said my mild BE could not be responsible for the volume. My recent shortness of breath is responding to an antihistimine, so, despite no blood test evidence of allergies (ie inflammation) it would appear I have an allergic reaction to something - yet to be tested again by skin prick. One GP said BE was a constant state of infection. Maybe in 50 years time these questions will be answered.