Lung cancer was considered to be one of the rarest diseases during the 1990s. But the prevalence of smoking habits among individuals has shown a drastic increase, which in turn has increased the rate of people getting affected by lung cancer. Not every individual who smokes is diagnosed with lung cancer, but smoking tends to increase the risk of cancer. Reports have revealed that smokers have a 15–30 times greater chance of getting lung cancer when compared with non-smokers.