We've been burning these a lot
The prevalence of human papilloma virus (HPV) infections in oral squamous cell carcinomas: a retrospective analysis of 88 patients and literature overview
It would seem it is trying to follow in the steps of a certain Jura canton in Switzerland which has not banned the vile habit from public places
All tobacco products, including cigarettes, cigars, pipe tobacco, chewing tobacco, and snuff, contain the Poisonous substances (toxins), Cancer-causing agents (carcinogens), Nicotine, an addictive substance All tobacco products, including cigarettes, cigars, pipes, and smokeless tobacco (chewing tobacco, snuff, or a type of chewing tobacco called betel quid) are linked to head and neck cancer (except for salivary gland cancers)
SCE, sister chromatid exchange