We also know that findings from the only global study carried out so far showed that in some places perhaps as many as 19% of MDR-TB cases were in fact XDR-TB, but this is likely to be uncommon.

我们还知道，来自迄今开展的唯一全球研究的结果显示，在有些地方，也许多达19%的耐多药结核病例实际上是广泛耐药结核，但这可能是不寻常的。

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