Tuberculosis (TB) is a contagious infection, usually attacking the lungs although it can spread to other body organs (Miliary TB) and is caused by mycobacteria (usually Mycobacterium tuberculosis). Like many other illnesses it is passed from person to person through airborne droplets from coughs, but also in the mucus that the affected person may cough up (this may be bloodstained). Children usually catch TB from another household member or school friend.
