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Tuberculosis (TB) is a communicable infection (can be transmitted from person to person) that usually affects the lungs. It is spread by airborne droplets when an infected person coughs or sneezes. It is caused by a bacterium called Mycobacterium tuberculosis. At the time of diagnosis, people with TB usually have a variety of symptoms such as low-grade fever, constant cough with sputum (phlegm), night sweats, and unintentional weight loss.
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Source: US Centers for Disease Control and Prevention
Punnoose AR, Lynm C, Golub RM. Tuberculosis. JAMA. 2013;309(9):938. doi:10.1001/2012.jama.10804
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