Sir82:
True, but only very specific ones.
With the exception of the stupidity that occured with cryoprecipitate in the mid to late 70's, which fractions available at the time were not allowed?
For decades, JWs would comb through old bound volumes to see if the particular fraction they needed was listed by name in a QFR. If not, perhaps the boldest of them would call the Society to ask about the fraction by name.
Yes, I have some actual letters and responses from that era. I don't have many, because they're not easy to come by, but I have yet to see one where the question that was raised had not already been addressed on multiple occasions.
The problems then are the same as the problems now.
1. JW's as a group don't understand the very simplest of medical terms.
2. JW's as a group not only can't think for themselves, they wouldn't want to even if they could.
The change in 2000 which was intended to remedy this problem has only made things worse.
The change in 2000 was significant - they allowed any and all fractions, so long as it was not one of the "big 4" fractions they specifically named.
It theory it was significant. In actual practice, it allowed a handful of obscure preparations that were actually far more "Minor" than what was already allowed. This included Platelet gell and Platelet and Leukocyte cytokines. (Platelet factor 4, Interleukins and Interferons (The latter two are both signaling molecules for the immune system))
The one single change in 2000 that has the potential to become significant for JW's as a community was the allowance of hemoglobin based blood substitutes, but these are currently hung up in clinical trials.
JWoods:
There was also the question (in my mind, never really resolved) if certain vaccines involved the use of blood. I think they pretty much just dropped any of the logical objections on this.
All post-exposure vaccines contain both gamma globulin and albumin. A fair amount of immunizations also contain very small amounts of albumin including the standard battery that children must have before attending public school (e.g. MMR, DPT, Varicella etc.)
The acceptance of gamma globulin and albumin has been a matter of conscience for JW's for a long, long time now.