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My Dad's 66. Smoker since 15. He's never had a cough in his life. Gets chest X-Rays and fluidic lung scans every year and he's got nothing wrong with him except Asthma from childhood. Amazing, isn't it? Good genes.
God Bless Him - Mom was a 2 pack a day smoke from the time she was in her teen till she was 82. Then she developed a slight cough, and was diagnosed with Stage IIIa non operable lung cancer - we lost her July 31st