Significant progress has been made in reducing the risk of pathogen transmission to
transfusion recipients. Nonetheless, there remains a continuing risk of transmission of
viruses, bacteria, protozoa, and prions to recipients. These include many of the viruses for
which specific screening tests exist as well as pathogens for which testing is currently not
being done, including various species of bacteria, babesiosis, variant Creutzfeld-Jacob
disease, hepatitis A virus, human herpes virus 8, chikungunya virus, Chagas disease, and …