The blood transfusion taboo of Jehovah's Witnesses: origin, development and function of a controversial doctrine.

Jehovah's Witnesses are not allowed to accept a blood transfusion. According to the Watch Tower Bible and Tract Society this therapy is a transgression of divine precepts. Additionally, in the judgement of the believers, secular proof is abundant these days; to them AIDS is a powerful justification to abstain from blood. Founded on the work of the anthropologist Mary Douglas, it is argued that the rejection of this medical therapy is based on perceptions of pollution and purity inherent in the Watch Tower Society's ideological concept of anti-worldliness. Rooted in the movement's pre-war opposition to vaccination the implementation of the taboo was triggered by the prevailing social-political climate surrounding the Society during the Second World War, resulting in this intriguing and controversial religious proscription. For the community of Jehovah's Witnesses the blood transfusion taboo still functions as a significant mechanism of sectarian boundary maintenance.