20 minutes - reduced heart rate and blood pressure
12 hours - normalized level of carbon monoxide in your blood
2 weeks to 3 months - improved circulation and lung function
1 to 9 months - decreased coughing/shortness of breath and normalized lung functioning
1 year - reduced risk of coronary heart disease, though still a greater risk than a nonsmoker
1.5 years - reduced risk of stroke
10 years - reduced risk of lung, mouth, throat, esophagus, bladder, cervix and pancreatic cancer
15 years - reduced risk of coronary heart disease to that of a nonsmoker
Source: The Great American Health Challenge, 2007 American Cancer Society, Inc.
The Effects of Secondhand Smoke
In adults who have never smoked, secondhand smoke can cause heart disease and/or lung cancer.
For nonsmokers, breathing secondhand smoke has immediate harmful effects on the cardiovascular system that can increase the risk for heart attack. People who already have heart disease are at especially high risk.
Nonsmokers who are exposed to secondhand smoke at home or work increase their heart disease risk by 25–30%.
Secondhand smoke exposure causes an estimated 46,000 heart disease deaths annually among adult nonsmokers in the United States.
Nonsmokers who are exposed to second hand smoke at home or work increase their lung cancer risk by 20-30%