[header] How to properly place a tb skin test [title] Know how tb spreads. [step] The tuberculosis bacteria are airborne, meaning they are put into the air when a person with tb disease in their lungs or throat coughs, sneezes, speaks, or sings. If a person breathes in the bacteria, s/he can become infected. 
[substeps] A person cannot get tb from touching people, shaking hands, or touching bed linens or toilet seats. A person cannot get tb by sharing food or drink, sharing toothbrushes, or kissing.