Drug resistance is more common in people who: 
Do not take their TB medicine regularly Do not take all of their TB medicine as told by their doctor or nurse Develop TB disease again, after having taken TB medicine in the past Come from areas of the world where drug-resistant TB is common Have spent time with someone known to have drug-resistant TB disease
Tuberculosis bacteria are put into the air when a person with TB disease of the lungs or throat coughs, sneezes, speaks, or sings. 
These bacteria can float in the air for several hours, depending on the environment. Persons who breathe in the air containing these bacteria can become infected.
Who is at highest risk for Multi-drug-resistant tuberculosis ?
Drug resistance is more common in people who: 
Do not take their {{ORGANIZATION}} medicine regularly Do not take all of their {{ORGANIZATION}} medicine as told by their doctor or nurse {{ORGANIZATION}} disease again, after having taken {{ORGANIZATION}} medicine in the past Come from areas of the world where drug-resistant {{ORGANIZATION}} is common Have spent time with someone known to have drug-resistant {{ORGANIZATION}} disease
Tuberculosis bacteria are put into the air when a person with TB disease of the lungs or throat coughs, sneezes, speaks, or sings. 
These bacteria can float in the air for several hours, depending on the environment. Persons who breathe in the air containing these bacteria can become infected.