Thirty-five per cent of the people in the U. S. are suffering perpetually from "bad colds." After a three years' study of the situation by its research division, the Public Health Service has started a serious investigation into the reason for this national nuisance and danger. The work is headed by Dr. J. G. Townsend. He keeps a bi-weekly record of the health of 12,000 individuals and 1,000 families in every State.
...
To continue reading:
or
Log-In
