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Credit
What is malaria? : and why is it most intense in hot climates? : an enquiry into the nature and cause of the so-called marsh poison, with remarks on the principles to be observed for the preservation of health in tropical climates and malarious districts / by C.F. Oldham. Public Domain Mark. Source: Wellcome Collection.
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This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.