Question: why do jehovah witnesses believe in blood transfusions?
Answer: On the basis of various biblical texts, including Genesis 9:4, Leviticus 17:10, and Acts 15:28-15:29, Jehovah's Witnesses believe: Blood represents life and is sacred to God. ... Blood must not be eaten or transfused, even in the case of a medical emergency. Blood leaving the body of a human or animal must be disposed of.