Understanding TB

TB is the largest infectious disease killer in the world.

One-quarter of the world’s population is infected with TB.  In 2016, 10.4 million people fell ill with TB and 1.7 million died.  Over 95% of TB deaths occurs in low- and middle-income countries.  In 2016, an estimated 1 million children became ill with TB and 250,000 died.  TB is the leading killer of HIV-positive people.  In 2016, 40% of HIV deaths were due to TB.

Multi-drug resistant TB (MDR-TB) is a public health crisis and a health security threat.  WHO estimates that there were 600,000 new cases with resistance to rifampicin — the most effective first-line drug, of which 490,000 had MDR-TB.