The only infectious disease which shows no abatement in its incidence is pneumonia, and the mortality in this increases with age.

Between thirty-five and fifty-five man stands on a tolerably firm foundation regarding health; after this the age atrophies begin, the effects of previous damage begin to be apparent, and the tumor incidence increases.
FOOTNOTE: [1] This was the case of a woman, by occupation a cook, whose numerous exchanges of service were accompanied by the appearance of cases of typhoid fever in the families.

This became so marked that an examination was made and she was found to be a typhoid carrier and as such constantly discharging typhoid bacilli.

She is now isolated..