Two of the top genomic databases widely used by clinical geneticists reflect a measurable bias toward genetic data based on European ancestry over that of African ancestry—a racial bias that has negative research implications.

That’s the finding of a new study published October 11 in the journal Nature Communications. Researchers examined the ClinVar and Human Gene Mutation Database, and in the process, showed a clear preference in those databases for European genetic variants over non-European variants.

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