White and gray poster with multicolor lettering. Title at top of poster. Visual image is a chart that bears the note text. The chart follows the incidence and mortality of diphtheria in Toronto from 1929 (1022 cases, 64 deaths), through the beginning of an immunization campaign to 1933 (56 cases, 5 deaths), to 1940 (no cases). Caption below chart. Publisher and printer information in lower right corner.
Copyright:
The National Library of Medicine believes this item to be in the public domain. (More information)