The first U.S. trials in people put CRISPR to the test in 2019

These studies are a first step toward fulfilling the gene editor’s medical promise

Cas9 protein

CRISPR/Cas9 is a gene-editing tool that many hope will correct genetic diseases. In this illustration, the Cas9 protein (pink) that cuts DNA is led to DNA (purple) by a CRISPR guide RNA (yellow). The gene editor is now being tested in people.

CRISPR Therapeutics

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