I'm currently in the process of gathering tons of Watchtower Quotes on Blood (Including the contradictory statements to the Media in other countries, such as Bulgaria).
I will try to post some info below to help you:
I don't know 100% what the Society's Current Blood Policy is (I don't know if even the Governing Body or the Elders do anymore).
However, here is what I have read is now ALLOWED by the Society:
Vaccinations (Shots) even if they contain Blood!
Organ Transplants even though the Organs contain Blood! (Probably a large amount of Blood too!)
Bone-Marrow Transplants
Hemophiliac Blood Treatments
All sorts of Blood Fractions
Here is a Pharisee-Like List of the "Acceptable Blood Fractions" which Witnesses are now allowed to accept (at least this is what I have heard and read, not 100% sure):
*Factor VIII
*Gamma Globulin
*Blood Plasma Proteins
*Albumin
*Immune Globulins
*Rh Immune Globulin
*Hemophiliac Preparations
*Clotting Factors
*Synthetic Hormone EPO (Erythropoietin) (contains only "a small amount of Albumin")
*Autologous Blood (Autotransfusion) (Where your own Blood "flows out through a tube to the Artificial Organ that pumps and filters (or oxygenates) it, and then it returns to the patient's circulatory system")
*Hemodilution
*HemoPure (Cow's Blood)
*PolyHeme (Recycled Human Hemoglobin purchased from the Red Cross)
Here are different lines of reasoning about blood, which I have found in different Watchtower Publications:
1: Jehovah's Witnesses are not supposed to use ANY blood for ANY "useful purpose" after it has been taken out of the body, and if we did, we would break Jehovah's Law on blood.
2: Jehovah's Witnesses can accept parts of blood, IF that part of the blood passes from the mother to the baby inside the womb.
3: Jehovah's Witnesses can accept parts of blood, IF they are "only small fractions".
4: Jehovah's Witnesses can accept any type of blood, IF it is not "nourishing the body" and IF it is not used to save your life.
5: Jehovah's Witnesses must not accept whole blood,
red blood cells, white blood cells, platelets, plasma (serum).
Also, Watchtower Spokesmen have made statements to the Media, in which they claim that if a Jehovah's Witness receives a blood transfusion and is "repentant" afterwards, then they will not have any action taken against them.
Also, Watchtower Spokesmen in Bulgaria have made statements to the Media, in which they claim that receiving a blood transfusion is 100% "up to your conscience" with absolutely no sanctions against Witnesses who receive blood transfusions.
Also in a 1960's Article the Watchtower Society said that Jehovah's Witness Doctors CAN GIVE Blood Transfusions to "Worldly People" -- However Witnesses are not even allowed to give Blood to their PETS -- Does this seem odd? I guess the Watchtower Society is basically saying that "Worldly People" are so wicked that it doesn't matter if you give them Blood, yet your Pets are better than Worldly People!
Eventually, in 1999, the Watchtower banned JW Doctors from giving transfusions to "worldly people".