Bronchitis is a condition in which you can have an illness that is both infectious and one that is
noninfectious. In most cases, it is a virus that causes bronchitis to happen. This virus is
generally the same type that causes a common cold to happen in most people.
On the other hand, bronchitis can also be a condition that is caused by the pollutants in the air
that you breathe including from cigarette smoke. Smog and chemicals that are used to clean
with are additional causes for bronchitis.