World health organization

10 facts about tuberculosis

DR-TB patient, Saadia, at the TB Centre, Kabul
WHO/Christopher Black

An estimated 480 000 people developed MDR-TB in 2013

In some cases an even more severe form of multi-drug resistant TB may develop with bad treatment. Extensively drug-resistant TB (XDR-TB) is a form of TB that responds to even fewer available medicines.

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