(CNN) – The United Kingdom has become the first country to give regulatory approval to a medical treatment involving the revolutionary CRISPR gene editing tool. The country’s Medicines and Healthcare products Regulatory Agency said Thursday it had given a greenlight to a treatment known as Casgevy, which will be used to treat sickle cell disease and beta thalassemia. Both genetic conditions are caused by errors in the genes for hemoglobin, which is used by red blood cells to carry oxygen around the body. There is no known universally successful treatment for either disorder. (Read More)