@danielad Your post could be from me! But I have figured it out for myself after a month of bronchitis. Looking back, every March, April , or May for the past 6 years when the pollen hits... I get bronchitis. I have learned to try and nip it, but this year it has lasted the entire month of March. Finally after 3 antibiotics nearing the end.
I just got a nebulizer! Jan/Fl.