避免已知的诱发癌症的因素；
避免哮喘诱发因素也可缓解哮喘的严重程度。
Avoiding asthma triggers can also reduce the severity of asthma.
结论及时有效控制感染，尽量避免过敏原，防止一切诱发哮喘的因素，是防止支管哮喘发生的关键环节。
Conclusion the effective control infection, avoid of allergen and prevention of asthma induced factors might be the key point of prevention of asthma happening.
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