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This review focused exclusively on evaluating the effects of a range of smoking cessation methods and did not set out to investigate broader aspects of the public health discourse regarding e-cigarettes, including their use among nonsmokers and young people

Although lung exposure to cigarette smoke leads to immune cell recruitment and tissue fibrosis, how cigarette smoke causes these changes is largely unknown

Spokesperson Ted Kwong said "the prohibition of vapour products for all adults in San Francisco will not effectively address underage use and will leave cigarettes on shelves as the only choice for adult smokers." The e-cig ban follows a ban on the sale of flavoured tobacco last year, and a tax on sugar sweetened drinks in 2016

Let others smell it too and they hate it

It felt commercial in the context of what we used to make, he says