Tuberculosis is caused by the bacteria Mycobacterium tuberculosis, which most often affects the lungs. It is one of the top 10 causes of death worldwide. In 2017, 10 million people developed TB globally and 1.6 million died from it. India accounts for 27% of global estimated TB cases and 25% of estimated deaths. Active TB occurs when the bacteria are multiplying and invading organs, while latent TB means the person is infected but not yet showing symptoms. Treatment involves a combination of drugs over a period of 6-9 months. Adherence to treatment is important to cure the disease and prevent drug resistance.