Mirick et al noted that blood from prison and skid row populations was at least 10 times that from volunteer donors. Linked evidence CGRA0000980 - Mirick et al Modification of post transfusion hepatitis by gamma globulin New England Journal of Medicine - 08 Jul 1965 Chronology Information Date: 8 July 1965 Chapter/issue Knowledge: Hepatitis Risks 1970 and after