Tuberculosis (TB) is a disease caused by TB bacteria spreading through the air from person to person. TB mostly affects the lungs but can affect any organ, such as the spine and the brain / central nervous system. The vaccine against TB is called the Bacille Calmette-Guérin (BCG) vaccine. The BCG vaccine is given by injection just under the skin on the upper arm. BCG vaccination gives good immunity against TB disease (active TB) and even provides some protection against TB infection (latent TB). In addition, the BCG immunisation provides protection even against some non-TB infections.