癌症世界

匹兹堡—在1971年,尼克松总统发动了一场针对癌症的“战争”。但近四十年后,这场战役的焦点仍然是开发具有高赢利性的治疗癌症的药物和技术方面的努力,而引发癌症的环境因素却几乎被忽略了。

诚然,死于癌症的人数量下降首先是因为控制吸烟—一项千呼万唤始出来,却仍然乏力的举措。在乳腺、肛肠和子宫颈癌的诊断和治疗方面的成功也助了一臂之力。

但美国和世界其他地方的黑人和少数族裔却没有分享到这些成功,环境因素似乎可以解释这种不平等。例如,尽管美国人口中有八分之一是黑人,但他们当中的三分之一从事着保洁或其他的蓝领工作。另外,他们体内可预防癌症的维生素D水平只有白人的一半,并且还更有可能居住在受到污染的社区。

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