It seems with COPD no two peoples stories are the same. I was diagnosed moderate three years ago, my spiro scores deteriorated , particularly last year, but no infections at all in that time.... tho often feeling short of breath even when sitting down. I had annual check up yesterday and my scores are now near those when I was first diagnosed, with SATS of 98!
I have no idea why my lung function seemed to get worse so suddenly and then apparently better .... (its not asthma) ..... I think we can all only take it day by day, exacerbations are not the only factors I think, tho I dont think even the medics can explain how and why this disease progresses differently for different people.... aprt from smoking of course
Im lucky I know, I think I have some time yet before I am seriously affected. There are some very very brave people here.
Hope you keep as well as poss