10 Most Dangerous Diseases of the XX Century

TUBERCULOSIS. Tubercle bacillus that provokes tuberculosis is virtually everywhere. A sick person who has the tuberculosis bacillus in the sputum becomes the source of infection. Infection may not manifest itself for a long time getting into the organism of healthy people. But when a person’s immunity reduces, for example, as a result of poor nutrition or adverse living conditions, the development of tuberculosis begins.