Many people who have latent TB infection never develop TB disease. But some people who have latent TB infection are more likely to develop TB disease than others. Those at high risk for developing TB disease include:
People with HIV infection
People who became infected with TB bacteria in the last 2 years
Babies and young children
People who inject illegal drugs
People who are sick with other diseases that weaken the immune system
Elderly people
People who were not treated correctly for TB in the past