Jan, the reason I asked is that many of the people, including myself, who my husband, a consultant clinical microbiologist, is treating for C Pn infection as a possible cause for MS, chronic fatigue, reactive arthritis and so on, can trace the onset of the disease back to an extremely bad cold a little while before the onset of the first symptoms. Personally, I experienced this before my disease turned progressive, but I can't in all honestly say if I had a respiratory infection before I first developed RRMS because it was quite a long while ago: I was scarcely out of college. Also it was so benign for so long that I didn't even realise I had it, (or I chose no to think about it which is quite easy when you only have a comparatively minor relapse every two or three years.) All this time, though, I developed a dreadful, hacking cough every winter, which carried on and on. A chest x-ray showed nothing untoward and I put it down to being slightly allergic to turpentine: I am an artist, so I tried to avoid using it as much as possible. Now, after one year and three months of treatment, apart from being vastly better otherwise, as you can see from my entry in the regimens section, I can use turpentine to my hearts content without coughing.