and they don't accept blood transfusions.
They don't accept transfusions of whole blood or of four other components of blood. They accept a whole host of other components and products derived from blood.
They do not allow the donation of blood even for storage and use by the same person. They say the blood removed should be destroyed. Yet they willingly accept many products derived from donate blood.
If everyone in the world was a Witness there would be no donated blood. The blood policy is a mish mash of compromise and obfuscation. The blood policy stands in good company with lots of other WTS doctrine in it's level of illogicality but surpasses all others for it's hypocrisy, danger and selfishness.