It is an airborne and contagious disease . Here , CNN compiles TB 's killer facts : . If left untreated , the disease is deadly . The combination of tuberculosis and malaria is particularly lethal . Some drug - resistant forms of TB are virtually untreatable .
It is an airborne and contagious disease . If left untreated , the disease is deadly . The combination of tuberculosis and malaria is particularly lethal . Some drug - resistant forms of TB are virtually untreatable .