MY THEME, which is foreshadowed in the title, might lead along two distinct paths. I mention one ofthese only because I may have been expected to follow it. I refer to the fact that the natural bodily processes tending towards health and towards a resolution of illness have become more than a little obscured by the recent flood of advances in chemotherapy. It is indeed difficult for a house physician at the present time to find out by experience what a child does with pneumonia with no more help than the good nursing which, thirty years ago, was the only treatment. Today, and we all agree about this, even a boil must not be allowed to take care of itself. I feel that in the best of the medical schools the teaching does include a reminder that children lived through illnesses before penicillin and that even today it is the child and the living tissues that ultimately bring about a restoration of health, not the antibiotic.