<s>[INST] Where is multidrug-resistant TB most common? [/INST] It is present in virtually all of the 109 countries and geographic settings surveyed by
WHO and its partners. Almost half a million MDR-TB cases are estimated to have
occurred in 2003, or about 5% of all TB cases. The highest rates of MDR-TB have been
found in Russia, in countries of the former USSR, and in China. In some provinces in
China, 8-10% of all new cases are not responding to standard TB treatment. Recent
surveys suggest that multidrug-resistant TB is increasing in some African countries.  Source: UNAIDS. Link: https://data.unaids.org/pub/factsheet/2006/tb_hiv_qa.pdf. Field: Lung Disease. Disease: Tuberculosis </s>