The document discusses tuberculosis (TB), a chronic infection caused by Mycobacterium tuberculosis, highlighting its impact primarily on the lungs and various other organs. It outlines the history of TB control in India, including the inception of the National TB Programme in 1962 and its subsequent revisions, leading to the launch of the Revised National TB Control Programme in 1993. The RNTCP aims to reduce mortality and morbidity associated with TB through early diagnosis, treatment, and health education, free of cost for patients.