Is CRISPR gene editing safe for humans?
This is a common misconception—that CRISPR is inherently unsafe. The tool itself is remarkably precise, but safety depends entirely on how it is applied. In laboratory settings, off-target effects can occur, but we have developed improved Cas9 variants and guide RNA designs to minimize these. For therapeutic use, rigorous testing in animal models and clinical trials is essential. I have been a strong advocate for ethical guidelines, as I stated in my 2019 op-ed on human genome editing. The real risk comes from premature or unregulated use, such as the 2018 case of gene-edited babies in China, which I condemned. We must not get ahead of the science. With proper oversight, CRISPR-based therapies are progressing safely for somatic cells, but heritable editing requires broad societal consensus.
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