Most cases of chronic bronchitis are caused by smoking cigarettes or other forms of tobacco.
en.wikipedia.org In 1859, following a late-night excursion to count the rings of tree stumps during a rain storm, he became ill with bronchitis.
en.wikipedia.org Symptoms of chronic bronchitis may include wheezing and shortness of breath, especially upon exertion and low oxygen saturations.
en.wikipedia.org Although he had to abandon the contest after five events due to bronchitis, he was still classed sixth.
en.wikipedia.org The leading causes of morbidity as of 2002 were diarrhea, bronchitis, pneumonia, influenza, hypertension, tuberculosis, heart disease, malaria, chickenpox, and measles.
en.wikipedia.org