The toxins can be particularly harmful for people with weakened immune systems.

而这些有毒物质对于免疫系统低下的人可能尤为有害。

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However, children, the elderly and those with weakened immune systems are advised against eating lightly-cooked eggs.

但是，不建议孩子，老人以及抵抗力较弱者食用这种微熟的鸡蛋。

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Salmonella can cause serious and sometimes fatal infections particularly in young children, frail or elderly people, and those with weakened immune systems.

圣保罗沙门氏菌可以引发严重的、有时甚至是致命的感染，而幼童、老人、体弱者，以及免疫系统较差的人士必须格外小心。

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But Legionella bacteria can cause a form of pneumonia in people with weakened immune systems.

VOA: special.2011.04.06

Fungi which don't often cause infections in people with healthy immune systems but can under some circumstances, and can be tremendous problems in patients that have weakened immune systems.

真菌在免疫系统健康的情况下通常,不引起感染,但在某些情况下也会感染,那就成了极大的问题,在免疫系统脆弱的病人体内

耶鲁公开课 - 生物医学工程探索课程节选

It can lead to a lack of energy, weakened immune systems and delayed periods.

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People at risk include infants, pregnant women, adults with weakened immune systems and older adults.

CNN: STORY HIGHLIGHTS

At risk groups include the over-65s, pregnant women, people with weakened immune systems and other health conditions.

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