pulmonary disease.

Risk factors

Situations in which TB may become reactivated are:
* if there is onset of a disease affecting the immune system (such as acquired immunodeficiency syndrome [AIDS]) or a disease whose treatment affects the immune system (such as chemotherapy in cancer or systemic steroids in asthma or Enbrel, Humira, or Orencia in rheumatoid arthritis);
* malnutrition (which may be the result of illness or injury affecting the

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