According to the Feb 15 2006 Watchtower, in July 1945 Jehovah God "doctrinally enlightened" His chosen people regarding His new policy on blood transfusions. But the technique of transfusing blood was perfected (more or less) in 1916. If the blood issue is SO important, why did God wait 29 years to announce this change of policy?
And why is it that Jehovah's Witnesses can have every 'part' of blood, just not all parts at once?
Lastly, since JWs can take blood fractions, why can't they donate blood? Why do they rely on non-JWs to donate the fractions they accept?