一些研究结果表明它们会引起癌症，过敏和其它健康问题，与此同时，也有其它研究在考证这些发现。
Some studies have suggested that they cause cancer, allergies, and other health problems, while other studies question those findings.
先前的研究已经证实了过敏症和脑癌是相对立的关系。并且过敏症对于癌症的抑制有促进作用。
Previous research had detected similar inverse correlations between allergies and brain tumours, suggesting that a welcome side effect of allergy was resistance to cancer.
对人类健康的影响包括更高的中毒、过敏、抗药性、免疫低下和癌症的风险。
Human health effects can include higher risks of toxicity, allergenicity, antibiotic resistance, immune-suppression and cancer.
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