Thanks, BluesBrother and TD, for the info.
I am still not convinced the JWs really endorse use of Factor VIII. Serums used for vaccinations use only a minute amount of blood to produce a medication. The resulting medication is not a blood product. I guess you could liken it to eating a bread made from yeast--the bread couldn't have been made w/o yeast, but most of its volume is other ingredients. Eating straight yeast is a different thing.
Factor VIII is transfused in units, just like whole blood. The only difference between Factor VIII and whole blood is this. Clotting factor--which is a blood cell--is removed from about 3000 units of whole blood to produce one unit of Factor VIII. The entire product is made 100% from human blood, not a minute part of it, as in serums/vaccinations. Factor VIII, for a significant bleed, is given in doses of several units--again more evidence that accepting such treatment is far from taking a "small amount" of blood.
The JW quote:
"What, however, about accepting serum injections to fight against disease, such as are employed for ...hemophilia ...?"
The only serum injection I could find used to treat a bleeding disorder is Factor VIIa http://www.hemophilia.org/research/masac/masac134.htm. The National Hemophilia Organization (US) says: "Recombinant factor VIIa is produced by baby hamster kidney cells. No human albumin is used in its production or formulation; bovine serum albumin is used in its production." This, again, is an example of a product made from a small amount of blood, just like serums and vaccinations, but is not a blood transfusion. This product is very different than Factor VIII.
"Some Christians believe that accepting a small amount of a blood derivative for such a purpose would not be a manifestation of disrespect for God?s law; their conscience would permit such...Others, though, feel conscientiously obliged to refuse serums because these contain blood, though only a tiny amount."
Factor VIII is far from being a "tiny amount" of human blood.