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Credit
Dr. Thorne Thorne's report to the local government board on a prevalence of diphtheria in the urban sanitary district of Denbigh, and on the general sanitary circumstances prevailing there. Public Domain Mark. Source: Wellcome Collection.
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This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.