What is TB? Tuberculosis, also known as TB, is a bacterial infection that primarily affects a person's lungs. Its symptoms vary widely depending on how the slow-growing mycobacterium that causes ...

Each year, tuberculosis kills some 1.25 million people globally and more than 10 times that number become infected with the disease annually, according to the World Health Organization.

Bacterial load of the infected person: Individuals with cavitary lesions in their lungs or positive sputum smears typically release more bacteria when coughing, making them more infectious.

TB primarily affects the lungs and can spread to other parts of the body, such as the brain, spine, lymph nodes and kidneys. Not everyone infected with tuberculosis becomes ill immediately.

Tuberculosis is caused by airborne bacteria that mostly affects the lungs. Roughly a quarter of the global population is estimated to have TB, but only about 5–10% of those develop symptoms.

Tuberculosis is caused by airborne bacteria that mostly affects the lungs. Roughly a quarter of the global population is estimated to have TB, but only about 5–10% of those develop symptoms.

Tuberculosis is caused by airborne bacteria that mostly affects the lungs. Roughly a quarter of the global population is estimated to have TB, but only about 5–10% of those develop symptoms.

Tuberculosis is caused by airborne bacteria that mostly affects the lungs. Roughly a quarter of the global population is estimated to have TB, but only about 5–10% of those develop symptoms.

Tuberculosis is a bacterial infection that affects the lungs. It spreads through close, face-to-face contact with the infected person. It can be treated with medication.

Each year, tuberculosis kills some 1.25 million people globally and more than 10 times that number become infected with the disease annually, according to the World Health Organization.