warning labels on cigarette packs F.D.A. Hopes to Take Any Glamour Out of Smoking Assessing Cigarette Packs Sold in
Description
It begins much earlier, at the level of the blood vessels

Consider Your Flavour Preference Not all cigarettes taste the same

World Health Organization, 2025
During allergen-induced airway inflammation IL-17A primes recruitment of alveolar macrophages and neutrophils and regulates airway hyper-reactivity to methacholine [283,285]

PMID 28345836

I dont think it was because of causation but rather correlation
