A major breakthrough in epidemiology came with the introduction of statistical maps and graphs. They allowed careful analysis of seasonality issues in disease incidents, and the maps allowed public health officials to identify critical loci for the dissemination of disease. John Snow in London developed the methods. In 1849, he observed that the symptoms of cholera, which had already claimed around 500 lives within a month, were vomiting and diarrhoea. He concluded that the source of contamination must be through ingestion, rather than inhalation as was previously thought. It was this insight that resulted in the removal of The Pump On Broad Street, after which deaths from cholera plummeted. English nurse Florence Nightingale pioneered analysis of large amounts of statistical data, using graphs and tables, regarding the condition of thousands of patients in the Crimean War to evaluate the efficacy of hospital services. Her methods proved convincing and led to reforms in military and civilian hospitals, usually with the full support of the government.
A major breakthrough in epidemiology came with the introduction of statistical maps and graphs They allowed careful analysis of seasonality issues in disease incidents and the maps allowed public health officials to identify critical loci for the dissemination of disease John Snow in London developed the methods In 1849 he observed that the symptoms of cholera which had already claimed around 500 lives within a month were vomiting and diarrhoea He concluded that the source of contamination must be through ingestion rather than inhalation as was previously thought It was this insight that resulted in the removal of The Pump On Broad Street after which deaths from cholera plummeted English nurse Florence Nightingale pioneered analysis of large amounts of statistical data using graphs and tables regarding the condition of thousands of patients in the Crimean War to evaluate the efficacy of hospital services Her methods proved convincing and led to reforms in military and civilian hospitals usually with the full support of the government