If you're trying to say that immunostimulant is a term of art distinct from immune checkpoint inhibitor, then fair point.
But what it seems like you're saying is checkpoint inhibitors don't "enrage/activate" the immune system, and they only target tumours, and both points are misleading if not outright wrong.
But what it seems like you're saying is checkpoint inhibitors don't "enrage/activate" the immune system, and they only target tumours, and both points are misleading if not outright wrong.