CRISPR gene editor could spark immune reaction in people
Having antibodies against Cas9 ‘molecular scissors’ is common, study suggests
![illustration of scissors cutting DNA](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/01/010818_TS_CRISPR_ticker_main_FREE.jpg?fit=860%2C460&ssl=1)
TECHNICAL DIFFICULTIES Scientists doing gene editing need to be aware of potential immune system attacks against a DNA-cutting protein.
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