Jehovah's Witnesses and blood transfusions

Jehovah's Witnesses believe that the Bible prohibits Christians from accepting blood transfusions. Their literature states that, "'abstaining from ... blood' means not accepting blood transfusions and not donating or storing their own blood for transfusion." The belief is based on an interpretation of scripture that differs from other Christian denominations. It is one of the doctrines for which Jehovah's Witnesses are best known.

Jehovah's Witnesses' literature teaches that their refusal of transfusions of whole blood or its four primary components—red cells, white cells, platelets and plasma—is a non-negotiable religious stand and that those who respect life as a gift from God do not try to sustain life by taking in blood, even in an emergency. Witnesses are taught that the use of fractions such as albumin, immunoglobulins and hemophiliac preparations are not absolutely prohibited and are instead a matter of personal choice.

The doctrine was introduced in 1945, and has undergone some changes since then. Members of the group who voluntarily accept a transfusion and are not deemed repentant are regarded as having disassociated themselves from the group by abandoning its doctrines and are subsequently shunned by members of the organization. Although the majority of Jehovah's Witnesses accept the doctrine, a minority do not.

The Watch Tower Society has established Hospital Information Services to provide education and facilitate bloodless surgery. This service also maintains Hospital Liaison Committees.