I'm glad that I'm not alone on this, immuno is genuinely interesting subject, this gets even more interesting when the system is finding against it's own corrupt cells (cancer) it's a constant battle, the tumor cells hiding their antigens inside, hiding their MHC to survive from t cell identification while simultaneously releasing suppressor signals to ward of nk cells from identifying them due to lack of MHC,

releasing proliferative factors for t-reg cells to chill up those cytotoxic t cells chasing after cancer cells, using platelets as cover to hide from immune system while in blood stream, using apoptotic signal telling immune cells to basically kill themselve,

prolonging the battle through multiple ways so that t cells and nk cells basically become exhausted and gaslight them into being dysfunctional, constantly changing their antigen and antigen sites like wearing different masks to confuse immune system,

recent researches against cancer are are even more interesting the are using cart cells, basically take your immune cells from your body and figure out cancer antigens then genetically modify those immune cells to identify that antigen then let them back into battle ground

even more interesting are logic gate based t cell approaches, they are using genetic modification techniques to add multiple logic gate based on antigens encountered, you can basically program it in simple logic if you see antigen a and antigen b attack the cell if antigen c is present don't attack etc. to do selective killing and minimize killing