Eat garlic can improve the immune system to prevent various diseases.

常吃大蒜还能提高免疫力，预防各种疾病。

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There is no medication for allergies unfortunately. But growing up does make it better. You can try beneficial bacteria to improve the immune system.

我女儿现在的体质也还是不好，但是荨麻疹已经没有再发过，可能是长大了。

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It helps to reduce stress, to improve the immune system, to fight cancer and aging, to reduce other effects of radiation, to improve adrenal function.

降心理压力，增强免疫系统，抗癌，抗衰老，减低电疗副作用，增进肾上腺机能。

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It is thought ingredients in ginseng improve the immune system by stimulating immunoglobin - proteins that act as antibodies.

BBC: Adults have two colds on average each year

But no matter where locals enter the choppy waters or what time of year they jump in, folklore suggests that the effects of an invigorating swim improve the immune system and contribute to good health.

BBC: Dublin��s chilly tradition

In addition, probiotics can help improve the function of your immune system and improve digestive function in general -- so I'm not surprised that you feel better after adding probiotics to your diet.

CNN: Can supplements block benefits of probiotics?