Is this related to the bad blood that came out of Arkansas prisons when the prisoners were allowed to sell their blood?
Yes.
Akansas Department of Corrections blood was sold to a Montreal blood broker and thence to Connaught Laboratories who used it to produce Factor 8.
As many units of blood were combined in each batch, it took only one unit out of the many to contaminate the whole batch of Factor 8.
Apparently Connought did not know, and did not inquire about the meaning, of "ADC" on the labels.