| human parvovirus b19 infection in blood donors. | using an immunodiffusion assay, we tested all of the blood units donated at the fukuoka red cross blood center from june 1991 to july 1994 for b19 antigen. over this 3-year trial period, we detected 16 viremic cases out of approximately 560,000 blood donors. interestingly, most of the viremic donors (15 out of 16) were detected between february 1992 and january 1993, which coincided with a local erythema infectiosum epidemic in the fukuoka area (december 1991 to august 1992). in particular, we d ... | 1995 | 8578732 |