I have copd 2 and just done a peak flow meter reading which said 250. I have a chest infection at the moment which I have Doxycycline for. I was having breathing problems the other night so had to go to our local walk-in-centre. I haven't done a reading for a while so, don't know if it would have been any different if I didn't have the chest infection. On a plus side I had another spirometry test done a few weeks and I have gone from being 99% in January last year to 92% this year.