As of October 2012 84 countries had reported at least 1 case of extensively drug resistant tuberculosis (EDR TB). In November 2012, the WHO epidemiological surveillance stated: all new TB cases in the world are 3,7 % of multi-drug resistant tuberculosis (MDR TB); 60,0 % of MDR TB among the new cases of TB are documented in Brazil, China, India, and South Africa.
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