Coughs can be caused by many things such as colds, pneumonia, smoking and other irritants. The cure for these will vary dependent on the cause.Most coughs are caused by colds, which are due to a...
Because the virus is so easily spread, it also changes all the time so your body cannot create defenses against it. Also, the virus spreads all over you body so whenever you take a breath, you spread...
its contagious so it gets spread really easily Also your body can't make itself immune to colds, because there's so many different colds going around. That's why there's no cold vaccine - it's...