CAR T cells are a new cancer treatment that has been very successful, but the FDA is worried that they might also cause cancer in some patients.
This is because CAR T cells are made by genetically engineering a patient's own immune cells to attack cancer cells, and this process can sometimes cause unintended changes to the patient's DNA.
However, the FDA says that the risk of developing cancer from CAR T cell therapy is very small, and that it is still a valuable treatment for people with cancer.
Researchers are now working on ways to make CAR T cell therapy even safer.
