The T cells first determine if you specifically have come under attack. The concept is called the major histocompatibility complex, or MHC—another immunological term that goes down like cold lemonade on a freezing day. The net consequence of MHC is that it allows T cells roaming the Festival of Life to avoid killing what Doherty calls the “normal guys” that happen to be nearby. “The assassination is precise, local, and very specifically targeted!
