Scientists accidentally discover new type of immune cell that kills most cancers

Until now, no one believed this kind of broad-spectrum cure for cancer was possible.

The researchers were toying around with a special type of genetic screening using CRISPR-Cas9, a technology derived from the genomes of bacteria that is capable of flagging and editing genes within organisms. They found a special type of human immune cell, or T-cell, that's capable of targeting cancerous tissue and killing it while leaving normal tissue untouched.