Positive nicotine test results can indicate recent tobacco use, exposure to secondhand smoke, or the use of nicotine-containing products , such as patches, gum, or e-cigarettes (vaping)
However, having your whole tobacco crop get contaminated is annoying enough
Although some smokers live long, others develop smoking-related diseases and even die from them in their 40s
Beyond the exemption, federal excise, provincial tax, and special duties applyoften making foreign cigarettes more expensive than local brands
Thus, smokers who reduced their use of regular cigarettes in favor of vaping may have lost some of the hypothesized protective effect afforded by CO, which could have increased their risk of developing autoimmunity