另一方面，即使男性拥有一个更加强健的免疫系统，能够消除感染，他们也会快速地被再次感染，所以免疫系统的有效效益很低。

On the other hand, even if males have a strong immune system that clears infection, they will become reinfected rapidly, so the effective benefit of immunity is low.

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各国在医疗装置方面的政策做出改进，会使卫生保健的质量、效益和覆盖面得以提高。

Better policy in countries will lead to an increase in the quality, effectiveness and coverage of health care with regards to medical devices.

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这种变动过程一方面提高了效益量级，另一方面也导致了实施费用的增长。

This changing process raises profit scale on the one hand, and causes the implementation expenditure on the other hand.

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