How many of us suffering from colds, coughs and such as the like whilst smoking thought the quacks and health professionals were "just saying that" when they kept telling us that our habit was making things worse?
My OH had a nasty cold, sore throat, fever, cough and light headed-ness, the worst of it lasted for about 5 days - I had a sore throat for two days! Physically he is a lot fitter and more agile than me but he smokes cafe creme cigars, sometimes up to 10 a day. So this may be a massive co-incidence but I would bet my quit that his smoking definitely exacerbated his symptoms