• Background of the study

Secondhand smoke is the toxic waste of tobacco combustion emitted from the combination of tobacco smoke from the burning ends of cigarettes, pipes and cigars and exhaled smoke from smokers. The widespread practice of smoking in buildings exposes nonsmoking occupants to combustion by-products under conditions where airborne contaminant removal is slow and uncertain. Over the past two decades, medical science has shown that nonsmokers suffer many of the diseases of active smoking when they breathe secondhand smoke.

Several negative health effects have been associated with smoking; however these effects are not restricted to smokers only.
Secondhand smoking increases the risk of death in both adults and children.
Secondhand smoking has also been associated with increased morbidity in adults and children. The risk of lung cancer in nonsmokers exposed to secondhand smoking is increased by between 20% and 30% and the risk of heart disease by 30%. Even children exposed to secondhand smoking are at particular risk of developing more respiratory symptoms such as coughing and wheezing, worsening of asthma, middle ear disease, neurobehavioral impairment and cardiovascular disease in adulthood.
Several studies have been conducted both on the burden of tobacco use and associated risk factors.


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Second hand smoking is extremely harmful, that's true. But still I am sure that smokers by themselves are under the biggest risks (happily I got rid from the awful habit thanks to vaping and Yocan Evolve ).


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