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In Estonia, Latvia and Moldova, WHO said people infected with both HIV and TB were more likely to develop drug-resistant TB. But there is no information from many countries across Africa where the most people with HIV live.
Some health experts wondered why WHO's report failed to mention in detail one of the main drivers of drug resistance: bad medicines.
"Many substandard drugs are fakes, but we are also concerned about legitimately manufactured copies -- mainly from India and China -- which are not made to exacting high standards," said Philip Stevens, a health policy expert at the London think-tank International Policy Network.
Stevens said the lack of global TB data was troubling. "WHO doesn't really have a clue as to the true extent of the problem," he said. "It's difficult then, to start promoting targets and goals when you don't know what baseline you are starting from."
WHO reported rates of drug-resistant TB were dropping in some parts of Russia with previously large outbreaks.
"It's good news that it can be controlled even in those difficult regions," said Ruth McNerney, a TB expert at London's School of Hygiene and Tropical Medicine, who was not connected to the report.
McNerney said that though progress was being made, authorities need more money to fight it, and more information about where the disease is striking. "We've got to find out where there are very serious problems, otherwise we won't know about it until it's too late."
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