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It mentions how smoking is ridiculous, and that singers shouldnt be smoking in the first place

"Chapter 39: Hemoptysis"

However, this was not substantially proven at the time

Healthline Study Links E-Cigarette Use to Erectile Dysfunction American Academy of Family Physicians E-Cigarettes May Be Independently Linked to Erectile Dysfunction, New Research Finds NYU Langone Health Association of E-Cigarette Use With Erectile Dysfunction: The Population Assessment of Tobacco and Health Study PubMed

The early symptoms of COPD are shortness of breath while being active, coughing out mucus (phlegm), and rattling or wheezing noises from the chest region