do cigarettes affect immune system Cigarette smoking weakens your and increases your risk for respiratory infections. For free help to quit smoking visit CDC.gov/quit Researchers have discovered that smoking

Researchers have discovered that smoking has long lasting effects on the immune system and its response for a long time even after quitting. The study analysed 136 environmental factors that contribute to changes Need a reason to quit smoking? According to the CDC, There is no safe level of exposure to secondhand smoke; even brief exposure can cause immediate harm. Secondhand smoke exposure can produce Smoking's effects on the immune system can last years, study finds CNN Cigarette smoke exposure and alveolar macrophages: mechanisms for lung disease Thorax

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