An allograft is a tissue graft from someone else, in contrast with an autograft, in which the donor and the recipient are the same person. Allografts are routinely used in many branches of medicine to do everything from replacing skin damaged by burns to giving someone with kidney failure a new kidney. Sources for allografts vary, with donor material usually being collected and stored by tissue banks, medical companies which specialize in retrieving, screening, and managing biological materials used in transplantation and grafting procedures.

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