Hello Thanks for your query. There is no harm of having sex after getting cured from tuberculosis for sure but smoking is really needed to be quitted because it will not only increase the chance of recurrence of tuberculosis but also increase the probability of having chronic obstructive lung diseases and lung cancer which are essentially incurable disease. Therefore urge your husband to quit smoking as soon as possible. Your husband may undergo nicotine replacement therapy along with counselling for that. Thank you. Regards Dr Arnab Maji