Around million people smoke in india most of them men according to the study. Smoking can cause enough damage to the lungs that the latent infection can no longer be contained researchers said.
The extreme risks from smoking that we found surprised us as smokers in india start at a later age than those in europe or america and smoke less said lead author prabhat jha of the toronto based centre for global health research.
As a result tuberculosis is the most common cause of smoking related deaths among indian men.
He said the study was prompted by a lack of research into the nature of smoking in india and other developing countries.
The results are partly explained by the fact that unlike in the west many people in india are infected with asymptomatic tuberculosis.
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