Bypassing broken genes

A new approach to gene editing using the CRISPR/Cas9 system bypasses disease-causing mutations in a gene, enabling treatment of genetic diseases linked to a single gene, such as cystic fibrosis, certain types of sickle cell anemia, and other rare diseases. The method involves inserting a new, fully functional copy of the gene that displaces the mutated gene.

from Latest Science News -- ScienceDaily https://www.sciencedaily.com/releases/2021/04/210421124533.htm