Stephanopoulos joins Roberts, who's been a co-anchor of ABC's Good Morning America since 2005. When not traveling around the country or the world covering breaking news events, Roberts is at GMA's studio in Times Square conducting interviews with a diverse group of newsmakers.
Tuberculosis, MTB, or TB (short for tubercle bacillus), in the past also called phthisis, phthisis pulmonalis, or consumption, is a widespread, infectious disease caused by various strains of mycobacteria, usually Mycobacterium tuberculosis.
Although BCG continues to be the preferred treatment for such cancers, it has not been clear how the pathogen invades the cancer cells and â once inside â leads to their destruction. Many researchers think BCG stimulates some form of antitumor immunity, but the exact mechanism has not been well understood.