Maneesh Kasera was a smoker for 28 years. Two years ago, he made the first attempt to quit smoking. He tried nicotine gums — a kind of chewing gum that delivers nicotine to the body — for a day or two but nothing could wean him away from cigarettes. Finally, he tried e-cigarettes. [...] Like Kasera, many Indians are vaping — the term for using e-cigarettes. But the recent advisory from the Indian government to ban e-cigarettes has thrown vapers or e-cigarette smokers into a tizzy.