Also, is chronic bronchitis always fatal? how fatal is chronic bronchitis?

Nah: Nope, chronic bronchitis is not always fatal. When smoking is associated, there is certainly a higher risk of an associated fatal disease, such as cancer or COPD, of course.

Not always fatal.: Chronic bronchitis is chronic, obviously, and progressive but is not universally fatal. There are medications available to improve survival in patients with chronic bronchitis and emphysema.