Robust evidence exists that HCAI can be prevented and the burden reduced by as much as 50% or more.

有证据显示，预防和控制医院感染可以减少负担50%或以上。

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Each year, hundreds of millions of patients all around the world are affected by health care-associated infections (HCAI).

全世界数亿病人每年都会受到卫生保健相关感染(HCAI)的影响。

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Although HCAI is the most frequent adverse event in health care, its true global burden has been unknown because of the difficulty in gathering reliable data.

尽管卫生保健相关感染是卫生保健方面碰到的最常见不良事件，但是其全球负担的真实情况尚不为人知，这是由于在收集可靠数据方面存有难度。

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