Diphtheria Infection and Morbidity in Cleveland, 1937-1939 Leonard M. Schuman, and James A. Doull CopyRight*The studies on which this report is based received financial support from the Committee on Administrative Practice of the American Public Health Association. Carrier and Schick testing surveys were made with the assistance of Dr. Joyce I. Hartman, Chief Medical Officer of the Cleveland Board of Education, and his staff. Data on prevalence and mortality were furnished by Dr. H. J. Knapp, Commissioner of Health, and Dr. R. J. Ochsner, Chief of the Bureau of Child Hygiene, Cleveland Division of Health. For advice and assistance on bacteriological aspects, the authors are especially indebted to Dr. Martin Frobisher, Jr. https://doi.org/10.2105/AJPH.30.3_Suppl.16 Published Online: September 01, 2011
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Schuman et al. (1940) studied this question.