My sons had the allergy tests and it says hes not allergic to mould or fungi but last week after being outside on a school trip his asthma flaired up, hes been fine all summer. The weather was good so its not the damp. The exact same thing happened last year and he was off school then for 6 months. I have no idea where to look for this information so any ideas would be great. We live in Kent if that helps.