<s>[INST] How tuberculosis spreads [/INST] TB is spread through the air from one person to another. The TB germs are spread into the air when a person with infectious TB disease of the lungs or throat coughs, speaks, or sings. People nearby may breathe in these TB germs and become infected.

When a person breathes in TB germs, the TB germs can settle in the lungs and begin to grow. From there, the TB germs can move through the blood to other parts of the body, such as the kidney, spine, or brain. Source: CDC. Link: https://www.cdc.gov/tb/publications/faqs/tb-qa.htm. Field: Lung Disease. Disease: Tuberculosis </s>