Several factors and other diseases increase the risk of developing tuberculosis (TB) and can affect the outcomes of TB. These conditions or co-morbidities, such as HIV infection, diabetes myelitis and undernutrition, significantly increase the risk of developing TB. Diabetes triples a person’s risk of developing TB. People living with HIV are 16-27 times more likely to develop TB, and TB accounts for 32 percent of deaths among people with HIV. More TB cases have been attributed to undernutrition than any other population-based, modifiable risk factor.