The body can only go so far - hence millions dying of influenza, the plague etc. The body is trying to kill off the bugs, but, when it is losing the battle, antibiotics and antivirals can finish the job and prevent the person dying.
I think the placebo effect is fascinating and real in tackling the emotional/psychological component of all illness, particularly pain. No illness is without that component and if thinking that you are having an active pill helps to alter your mindset and improve pain, then all good and well.
Last letters make new words - Series 3

