The researchers divided the cohort into three main categories: Non-Smokers (NS), Non-Smokers Exposed (NSE), and Current Smokers (S), or into five subgroups: Never Smokers (N), Never Smokers Exposed (NE), Former Smokers (F), Former Smokers Exposed (FE), and Current Smokers (S)
The fact that they are disposable and throwaway products also raises significant environmental concerns that should be taken into account
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Causes of weight gain Researchers do not know exactly why people gain weight when they quit smoking
Also, the bacteria causing strep infections flourishes where people are in close contact