Hellrider,
JWs are now allowed to take each and every fraction (all the differenet components in the blood) as long as it is divided up into fractions first
Yes.
You see, originally "Fractions" was a term used to describe plasma proteins and the JW's built an ad hoc system of rationalization around this fact. JW's taught for example that since plasma proteins were exchanged between mother and fetus, then it was O.K. to accept them.
However since medical science is finding more and more ways to fractionate blood and more and more uses for these "New" fractions, the JW's have had to adapt. Hemoglobin for example only exists safely encapsulated within red blood cells. Therefore the maternal/fetal relationship can't be made to serve as a rationalization for the acceptance of hemoglobin. What to do?
JW's have now (Since 2000) adopted blood banking terminology as their yardstick. Whole blood and "Primary components" (Red cells, white cells, platelets and plasma) are forbidden. Everything else is allowed.