Contagion: Historical Views of Diseases and EpidemicsHarvard University Library's Open Collections Program have brought together Philadelphia's yellow fever epidemic of 1793, London's Great Plague of 1665, and six other notable epidemics from world history. Contains historical pamphlets, serials, books, and manuscripts. Brief overviews of important concepts such as germ theory, public health, vaccination, medical geography, and humoral theory. For those with an interest in the history of medicine, public health, or diseases.