“…Findlay andMacCallum (1937, 1938) described cases due to the use of small amounts of human serum in yellow fever vaccfne, and outbreaks due to the same cause were noted by Fox et al (1942) in Brazil. Beeson et al (1944) reported 101 cases in 266 soldiers inoculated with mumps convalescent serum. Beeson (1943), Morgan and Williamson (1943), and Bradley, Loutit, and Maunsell (1944) published records of cases in peksons who had been transfused with whole blood or pooled plasma, and numerous reports have since appeared, including detailed follow-up investigations of groups of transfused persons by Spurling, Shone, and Vaughan (1946) and Lehane et al (1949) in Britain, andby Brightman andKorns (1947) in the United States of America.…”