I get it too because of asthma, and I do believe it helps, though like FV, I still get colds which often end up as chest infections. That's what triggered my asthma when I was 34.
These nasty little bugs seem to be on the increase, and of course, the more people you work/come into contact with, the more you get exposed to different strains. When I worked as a college technician, the students frequently brought pestilence, famine and death with them. I'm sure that Flu or the common cold is what will finally kill off mankind, it won't be a big war, terrorism, or natural disaster, just a little virus!
But I hope you get better!!!! ;-)
Steve