India, Sept. 24 -- Quitting smoking is a difficult process, especially for the ones who are addicted. However, when you quit smoking, does it automatically cut down lung cancer risk? In an interview with HT Lifestyle, Dr. Mandeep Singh Malhotra, director of surgical oncology at the CK Birla Hospital, Delhi said, "For ex-smokers, the journey doesn't end with giving up cigarettes. The harmful effects of tobacco may linger for years, which is why additional preventive measures are essential." Also read | Passive smoking can increase lung cancer risk? Pulmonologist lists 5 ways it can harm your lungs

Here's what ex-smokers should do:

Even after quitting, some people may occasionally relapse with "just one cigarette." This can undo much of t...