genetic engineering

CRISPR gene-edited babies may be at increased risk of early death

Our genomes contain two copies of the CCR5 gene. It is known that people who carry two defective copies of this gene are highly resistant to HIV. But this double mutation of the CCR5 gene, which a Chinese scientist intentionally edited into human embryos last year, is also associated with a 21% increased risk of dying early, a new study showed.

Genetically modified virus saves teen's life

Isabelle Carnell-Holdaway, 17, has faced not one but two unrelenting threats to her life. Diagnosed at 11 months of age with cystic fibrosis, the progressive genetic disease that causes lung infections and breathing impairment, Isabelle has also combated an on-again, off-again infection caused by antibiotic-resistant bacteria since age 8.

Chinese gene-editing scientist defends his research

The Chinese scientist who sparked an international outcry after alleging to have helped create the world's first genetically edited babies has raised the possibility of a third child being born, after announcing that a separate woman was pregnant at an early stage with a modified embryo.