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E-cigarettes are electronic devices that provide metered doses of a liquid mist to the user. The main ingredient of the mist is propylene glycol in combination with nicotine and/or flavouring compounds. In Canada, the nicotine-containing products are prohibited from sale, although they are available through international web vendors, and are easily accessible in the United States. The flavour-only products are generally available in Canada. The World Health Organization is concerned that e-cigarettes could undermine hard-fought gains in tobacco control, and anti-smoking advocates indicate that the use of flavoured e-cigarettes by children may influence them to take up smoking cigarettes later in life.
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