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Combating addiction 抵抗毒瘾 Can a vaccine stop drug abuse? 有抗毒品的疫苗么? It may be possible to vaccinate people againstaddictive drugs 也许通过接种疫苗帮助人们摆脱毒瘾将成为可能 THE idea of vaccinating drug addicts against their affliction is an intriguing one. 给瘾君子注射疫苗以帮助他们摆脱痛苦是一个非常有趣得想法。 In principle, it should not be too hard. 原则上，这并不难。 The immune system works, in part, by making antibodies that are specific to particularsorts of hostile molecule. 在某种程度上，免疫系统针对某些有害分子产生抗体来实现运作。 Such antibodies recognise and attach themselves to these molecules, rendering themharmless. 抗体可以识别这些分子并将自己与它们粘附在一起使得它们无害化。 Vaccines work by presenting the immune system with novel targets, so that it can learn toreact to them if it comes across them again. 接种疫苗就是通过向免疫系统提供新的目标，这样当免疫系统下次遇到这些目标时就会知道如何应对。 The problem is that the moleculesantibodies recognise and react to are the big ones, | 
