India, June 3 -- Smoking is a dangerous, fatal habit and there is no safe limit to it, no matter how one tries to justify it, whether as a social smoker during office breaks or by promising to only a one cigarette a day. But such compromises of 'once in a while' can still harm the body, as tobacco affects almost every organ and major physiological systems.ALSO READ: Smoking in your 20s and 30s? Cardiologist reveals early heart damage you may not feel yet: 'Even few cigarettes can.'

When you completely quit smoking, not just once in a while but strictly, your body begins to show major changes. From the first few minutes after your last cigarette, the healing process slowly begins.

In a conversation with HT Lifestyle, Dr (Col) SP Rai, con...