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Lung damage Smoking permanent lung tissue loss a chronic cough damage to the respiratory system increased chance of developing certain infections that affect the lungs, like tuberculosis and pneumonia Cancer risk People who smoke are emphysema chronic bronchitis chronic obstructive pulmonary disease (COPD) lung cancer adult-onset asthma Withdrawal from tobacco products can cause temporary congestion and respiratory discomfort as your lungs and airways begin to heal

According to the NHS some of the effects, both short and long term are as follows: After 20 minutes your pulse rate starts to return to normal After 8 hours your oxygen levels will be returning to normal and the carbon monoxide in your blood will have reduced by half After 48 hours your body will have flushed out all carbon monoxide, your lungs will start to clear out mucus and your sense of taste and smell will have improved After 72 hours your breathing may feel easier because your bronchial tubes have started to relax

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