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Like other unhealthy habits, quitting smoking at an older age cannot undo the harm that has accumulated over the years. But this doesn’t mean that it’s ultimately meaningless to break the habit.
Second-hand smoke is a mixture of smoke from the burning end of a cigarette, pipe or cigar, and the smoke exhaled from the lungs of smokers. It is involuntarily inhaled, lingers in the air hours after cigarettes have been extinguished, and may cause a wide range of adverse health effects, including cancer , respiratory infections , and asthma .
A systematic review showed that psychosocial interventions help women quit smoking in late pregnancy and can reduce the incidence of low birth weight infants. [162] It is a myth that a female smoker can cause harm to a fetus by quitting immediately upon discovering she is pregnant. This idea is not based on any medical study or fact. [163]
The risks of morbidity and mortality of infectious diseases are significantly reduced in 1 year and become comparable with non-smokers after 5 years of quitting. [20] Meanwhile, the life expectancy after smoking cessation increased by 10 years with the reduced risks of these diseases. [28]
The traditional assumption had been that after 15 years of no longer smoking, the risk of lung cancer had dropped to such a low level that screening was no longer cost effective.
A recent study found that smoking an e-cigarette decreased the amount of oxygen being taken in by the lungs, ... one before and one after smoking a tobacco cigarette, e-cigarette with nicotine and ...
Quitting all tobacco products definitively reduces risk the most. However, quitting is difficult, and even approved smoking cessation methods have a low success rate. [1] In addition, some smokers may be unable or unwilling to achieve abstinence. [15] Harm reduction is likely of substantial benefit to these smokers and public health.
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