癌症是人类的大敌，也是至今尚未攻克的顽症。从宏观上研究癌症的发病情况，从而找出预防措施，无疑也是与癌症斗争的重要方法。研究表明，以下一些体质或不良嗜好者易患癌症。过敏体质者美国科学家调查了近4万人，凡是有哮喘、药物或化学试剂过敏的人，比无过敏史者更易患癌症 Cancer is the enemy of mankind and it is also a chronic disease that has not yet been overcome. It is undoubtedly an important method to combat cancer by studying the incidence of cancer on a macro level and thus finding preventive measures. Research shows that the following constitution or bad habits are susceptible to cancer. Allergic American scientists surveyed nearly 40,000 people who are allergic to asthma, drugs or chemical agents and are more likely to have cancer than those without a history of allergies.