About blood fractions they once were totally against all of them then they allowed some and now I hear they will allow all, but don't quote me on that.
Their blood fraction policies change from year to year so where and what they are now is just guess work, you'd have to research their most recent articles
on the subject to find out the latest. Either way this was one of their most dumbest and volatile doctrines that they ever produced and there were many,
and I might add their most deadliest too, hundreds of JWS die every year prematurely just by this one inaccurate bible interpretation.
Don't ever second guess this policy to change though, the ramifications would be too enormous to handle not to mention the legal costs.