This historic illustration, served as an invitation to a lecture given during Child Health Week activities in Philadelphia, Pennsylvania. The original image was scanned from a glass lantern slide donated by the Minnesota Department of Health, and is contained in a historical collection of notices, as well as photographs, devoted to observances of Child Health Day in the United States. Starting May 1, 1924, May Day was designated Child Health Day in the United States, and its territories. Awareness of child health in America was stimulated, by the plight of refugee children during World War One (1914-1918). The American Child Health Association, which started the observance, was founded in 1923, when the Child Health Organization and the American Child Hygiene Association merged.