South Africa is among 10 hotspots of multi-drug resistant TB identified by the World Health Organisation and at Durban’s busiest TB treatment clinic, rates of MDR TB have more than doubled in the past three years. Multi-drug resistant (MDR) TB has more than doubled in the past three years at Durban's busiest TB treatment clinic, the Prince Cyril Zulu Communicable Diseases Centre in Warwick Triangle, which oversees the treatment of 5 000 TB patients every month.