Once a person has contracted Chagas disease, the infection may remain dormant for decades.

一个人一旦染上恰加斯病，这种感染可能潜伏数十年。

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The virus is dormant in the bone marrow cells, she said, but when those progenitor cells develop into blood cells, it can be reactivated and cause renewed infection.

她说，艾滋病毒平时蛰伏在骨髓当中，不过当这些祖细胞变成血液细胞时，病毒就会被激活，从而造成病人的再度感染。

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This, in turn, would make them susceptible to contracting TB or having a reactivation of past TB infection that was lying dormant in the body, he said.

BBC: NEWS | Health | TB 'may have killed off leprosy'