We already have tiny robots that can crawl through our body and remove damaged cells, including cancerous cells... our immune cells. Some immune cells can even

We already have tiny robots that can crawl through our body and remove damaged cells, including cancerous cells... our immune cells. Some immune cells can even crawl between other cells in solid organs, known as tissue infiltrating lymphocytes. The future may lie in engineering these already existing tools to be better. This is essentially the promise of new technologies like CAR T cell therapies, where immune cells are engineered to help control cancer.