If a hundred or a thousand people, all of the same
age, of the same constitution and habits, were suddenly
seized by the same illness, and one half of them were to
place themselves under the care of doctors, such as they
are in our time, whilst the other half entrusted themselves
to Nature and to their own discretion, I have not the
slightest doubt that there would be more cases of death
amongst the former, and more cases of recovery among
the latter.