尽管如此，他们认为可能与人体基因的某些组成成分有关，因为研究表明，那些有花粉病，气喘或是家庭成员中有过敏反应的人更加有可能患食品过敏反应。

There does, however, appear to be a genetic component, as studies show those who suffer from hay fever, or asthma, or who have family members with allergies, are more likely to develop food allergies.

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过敏的临床表现包括喷嚏、气喘、瘙痒和红疹等，这些都是免疫系统紊乱而对通常无害的外来物质发起攻击的表现。

The manifestations of allergy—sneezing, wheezing, itching, and rashes—are signs of an immune system running amok, attacking foreign invaders that normally mean no harm.

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这所谓的睡眠节律也会影响过敏和气喘。

These so-called circadian rhythms affect allergy and asthma, too.

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