Tuberculosis (TB) po ba? Nakakahawa po sya.
Pasting here the explanation from medicinenet.com:
TB is highly contagious and can be transmitted from an infected person to an uninfected person, mainly when a person with TB coughs, sneezes, speaks, or even sings (known as airborne transmission or airborne disease). Other people who breathe in the aerosolized bacteria can become infected. Some individuals have TB infections but show no symptoms because their bodies prevent TB organisms from growing. Patients with this type of infection are termed as having latent (dormant) TB. Individuals with latent TB have the organisms suppressed; in this condition, the individuals are not contagious for TB when the organisms are dormant. However, if a person with latent TB is no longer able to suppress the TB organisms, that individual can then become contagious.