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A potentially serious infectious bacterial disease that mostly affects the lungs. Tuberculosis is caused by bacteria that spread from person to person through microscopic droplets released into the air. This can occur when someone with the untreated, active form of tuberculosis coughs, speaks, sneezes, spits, laughs or sings. Although tuberculosis is contagious, it's not easy to seize. In order to control and prevent this disease Tamil Nadu government took number of steps particularly establish of Hospitals, Sanatoriums and Centers.