Largely as a result of the work of AJWRB and its supporters, it has become fairly well-known that the Watchtower permits the use of all plasma derivatives. These are concentrates of specific plasma proteins that are prepared from pools (many units) of Plasma.
(This illustration is taken from the October 22, 1990 issue of Awake! You will note that plasma constitutes 55% of the blood. Since the Watchtower Society allows Witnesses to accept the separate components of plasma, it is only reasonable to ask why they forbid the use of plasma itself?)
Plasma derivatives are obtained through a process, known as fractionation, developed during World War II, and are heat-treated and/or solvent detergent- treated to kill certain viruses, including HIV and hepatitis B and C. Plasma derivatives include: