Researchers in the UK are using genetic engineering to reprogram leukemia patient’s own immune cells to fight cancer. The NHS was among the first to authorise the use of Car-T therapy, which is extremely expensive — with a list price of £280,000 ($355,544.00) per patient. For cancers of the blood, Car-T is considered cutting edge treatment.

This video from Dana-Farber Cancer Institute explains how Car-T therapy works.

Named after the chimera (a mythical creature made from the parts of different animals—the head of a lion, the body of a goat) CAR (chimeric antigen receptor) is true to their name, CAR T-cells have key extra parts on their surface: manmade cell receptors that are designed to attach themselves to cancer cells and kill them.