Immunotherapy drugs assist the immune system in attacking the tumor.
The immune system has “immune barriers” which serve to regulate the immune system and prevent it from attacking the body. In cancer these functions are readily activated and as a result, the immune system ceases to attack cancerous cells, enabling the tumor to grow and proliferate in the body. For example, the biological drug Opidivo, Nivolumab, and Keytruda®,Nivolumab.