Any mention of the A-word in your records will generate a no. Similarly the H-word (hay fever) will generate a refusal.
Ecema is also a no-no generally.
A worried mother taking her youngest to the doctor for a check could get the 'no evidence of Asthma' in the notes. Unfortunately this is then construed as <<no evidence of asthma is not evidence of no asthma>>.
Sad but true.