I don't recall presenting a scenario at all. You clearly think the tetanus vaccine works. I have no opinion on the matter. The main argument that seems to be being made in this thread is that the vaccines, effective or not, were mostly unnecessary, due to the various side effects reported, and due to the fact that greater sanitation had already virtually wiped it out. What exactly do you disagree with? That the tetanus shot is profitable? They give it to everyone, how would it not be profitable?