Torah.org - The Judaism Site

LifeCycle Events: Death, Burial, and Bereavement: Donating Bone Marrow:

Can a Jew give bone marrow to someone with whom a match has been found through a bone marrow registry, even if that person is a non-Jew?

Absolutely. Someone who refrains from doing so because the recipient is a non-Jew may be regarded as a Rasha, an evil person.
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