An acquaintance believes that mandatory vaccination laws are "immoral." Her basic argument, as best I understand it, is that even if vaccines benefit almost everyone, there IS a risk -- however small -- that someone may be injured or even killed by a vaccine. Therefore, to force someone to get a shot that might possibly be hurtful is immoral. Somehow she equates mandatory vaccination to slavery -- something being imposed on people against their will. I don't think mandatory vaccination laws are immoral in the least. Her argument seems pretty wrong to me. Is it?