The World Health Organization (WHO) reports a substantial decrease fall in tuberculosis cases in China since the introduction of the TB control strategy known as DOTS.
The World Health Organization reports China and India together account for 40 percent of the world's eight million cases of tuberculosis. It says both countries have made good progress in trying to bring down the high rates of infection.
The World Health Organization says tuberculosis is steadily declining in most parts of the world. Exceptions are sub-Saharan Africa and countries of the former Soviet Union.
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Dr. Williams says HIV is driving the tuberculosis epidemic in Africa.