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Adding insult to injury, the tobacco companies can now claim that they are concerned, socially responsible companies that are contributing to the protection of the publics health

BMC Public Health shares these classifications as: 0 Pack Years Never Smokers 1 20 Pack Years Light Smokers 1 40 Pack Years Moderate Smokers More than 40 Pack Years Heavy Smokers How smokers are classified can affect the treatment methods and approaches doctors will choose when individuals are dealing with health problems

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The main alkaloid present in the tobacco plant is Nicotine

But this may depend on the severity of your infection, and whether previous courses of treatment have been unsuccessful

Image Credit: Bedfont Scientific Ltd Why is CO monitoring useful for smoking cessation