What is Factor?
In the 1970's and 1980's Factor VIII & IX concentrates were made by pooling up to 60,000 plasma donations and then "Fractionating" this plasma and processing it into the final "Antihemophilic Factor" Medicine. It would only take 1 infected donor to contaminate an entire batch.
Factor would generally be administered (often by the patients themselves or their family members) by a slow IV push (bolus injection).
It is often misreported that these treatments were "Blood Transfusions". Not True. Factor was a processed pharmaceutical product (pictured).
Please find a variety of Getty Images with Licensing Links of Factor for Press Use.