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世界无烟日(World No-Tobacco Day)自20世纪50年代以来,全球范围内已有大量流行病学研究证实,吸烟是导致肺癌的首要危险因素。为了引起国际社会对烟草危害人类健康的重视,世界卫生组织1987年11月建议将每年的4月7
World No-Tobacco Day Since the 1950s, a large number of epidemiological studies worldwide have confirmed that smoking is the leading risk factor for lung cancer. In order to arouse the international community’s attention to the harm of tobacco to human health, WHO recommended in November 1987 that the annual April 7