The disease of tuberculosis and the methods being adopted to fight it. Tuberculosis in the 19th century was the deadliest and most widespread disease in the western world. The “wasting sickness” spread until the bacillus was isolated and the X-ray machine invinted. Microphotography shows the white corpuscle attacking the bacilli and forming lesions. The work of the mobile X-ray units. Revolutionary changes in treatmnet with new drugs. By constant vigilance the disease can be kept in check.