An uncalculated risk.
D000818:Animals; D003141:Communicable Diseases; D006805:Human Experimentation; D006801:Humans; D016377:Organ Transplantation; D012306:Risk; D018570:Risk Assessment; D012926:Social Control, Formal; D013552:Swine; D014183:Transplantation, Heterologous
Biomedical and Behavioral Research; Health Care and Public Health