British 17-year-old Isabelle Holdaway is reported to be the first patient ever to receive a genetically modified phage therapy to treat a drug-resistant infection.

Phage therapy, viral phage therapy, or phagotherapy is the therapeutic use of bacteriophages for the treatment of pathogenic bacterial infections. This therapeutic approach emerged at the beginning of the 20th century but was progressively replaced by the use of antibiotics in most parts of the…