All of the following are true about tuberculosis, except that TB ___________.

Tuberculosis (TB) is indeed a serious infectious disease caused by bacteria that primarily affects the lungs but can also impact other organs. One significant aspect of TB is that it can indeed be fatal if left untreated or if the individual's immune system is compromised. The bacteria can damage and eat away at the tissues of the organs they infect, leading to severe health consequences.

In addition to being infectious, TB can spread through the lymph nodes and bloodstream, further complicating its clinical picture. This spread occurs when the bacteria move beyond the lungs, potentially affecting various body systems.

Thus, the statement that TB "cannot be fatal" is inaccurate, as it overlooks the serious risks associated with untreated TB infections, including the possibility of death.