A patient has been treated with a personalized CRISPR gene editing therapy, which is being hailed as a landmark treatment. The therapy appears to have been used to correct a genetic issue, although reports vary on the specific condition being treated, with some mentioning a genetic misspelling and others referencing conditions such as Down syndrome or sickle cell disease. The treatment is part of a collaboration involving several institutions, and it may pave the way for future clinical trials on rare diseases.