2006年前几个月，当艰难梭菌的感染率翻倍时，信息禁止向理事会或公众发布。

When the infection rate of Clostridium difficile doubled in the early months of 2006, the information was not released to the board or the public.

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在15岁至19岁的男孩中，可导致艾滋病的人类免疫缺陷病毒感染率从1997年的10万分之1.3升至2006年的10万分之2.5。

Infections with the human immune deficiency virus that causes AIDS rose among boys aged 15 to 19 from 1.3 cases per 100,000 in 1997 to 2.5 cases in 2006.

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一百年前，几乎每个人都会感染幽门螺旋杆菌，但抗生素的出现减少了它的感染率。

A hundred years ago, nearly everyone was infected with H. pylori. But the use of antibiotics has beaten back the bug.

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