poisonous substances in tobacco Chemicals Cigarettes: From Plant to Product to Puff Mayo Clinic Q and A:

A common precursor to oral cancer is leukoplakia, the formation of white, leathery patches inside the mouth, which are often observed in chewing tobacco users

WOMAN CLAIMS ALLERGIC REACTION TO VAPE CAUSED PAINFUL RASH, REQUIRED HOSPITAL VISIT The agency said the handful of seizure reports often lack information about the brand of e-cigarette or whether users had a medical condition that might have contributed

Hepatitis C is a blood borne virus which left untreated can cause liver disease, cancer and death

The potential loss in tobacco tax revenue from the reduced consumption of tobacco products was not a factor in this decision." ...our priority is to protect the health of our population and prevent e-cigarettes from causing harm to our people, especially to younger Singaporeans.Lawrence Wong Prof Lim had asked whether the potential loss in tobacco tax revenue has been a factor in the decision by the government to ban e-cigarettes, and what are the practical limitations to introducing an equivalent nicotine tax on e-cigarette products, were they to be made legal