Interesting quote from the 50's
*** w58 8/1 p. 478 Questions From Readers ***
Since an individual is not disfellowshiped because of having voluntarily taken a blood transfusion or having approved of a dear one’s accepting a blood transfusion, you have no right to bar this sister from the celebration of the Lord’s Evening Meal. As an anointed member of Christ’s body she is under orders and command by Christ Jesus to partake. Whether she is unfaithful as to what she professes to be by virtue of taking the emblems of the Lord’s Evening Meal is something for Jehovah God to determine himself. His judgment begins at the house of God. It is not for you or anyone serving the Memorial emblems to act as the judge, but to allow the emblems to go to anyone in the audience as these are passed along in the normal manner of letting each one have the opportunity to partake.