LIFELINE ON TUBERCULOSIS
What is tuberculosis?Doctor looking at X-ray
TB usually affects the lungs, although it can spread to other organs around the body.
Doctors make a distinction between two kinds of tuberculosis infection: latent and active.
Latent TB – the bacteria remain in the body in an inactive state. They cause no symptoms and are not contagious, but they can become active.
Active TB – the bacteria do cause symptoms and can be transmitted to others.
About one-third of the world’s population is believed to have latent TB. There is a 10 percent chance of latent TB becoming active, but this risk is much higher in people who have compromised immune systems i.e., people living with HIV or malnutrition, or people who smoke.
TB affects all age groups and all parts of the world. However, the disease mostly affects young adults and people living in developing countries. In 2012, 80 percent of reported TB cases occurred in just 22 countries.
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