cigarette hazards Give It Up: Cutting back helps, but even a or two a day carries risks Preventing Chronic Disease: April 2007:

Not only does this result in physical damage and staining, but it also leaves behind an insidious residue of toxins that can continue to harm long after the initial flames have been extinguished

Quitting is a powerful way to protect your health and lower your risk of serious illnesses, including COVID-19

Genetic factors, early-life respiratory infections and a history of asthma "can all also contribute to the development of COPD," Han said

Department of Health and Human Services Within 20 minutes of quitting smoking, your heart rate will decrease

The most common cause of a skin lesion is an infection on or in the skin