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Thando Gwetu, one of the Master of Public Health students I supervised while working at the University of Venda, conducted a study on the prevalence and risk factors for diarrhoea among adult Zimbabwean immigrants in Louis Trichardt. The results were published as a scientific letter – of which I am the second author - in the April 2011 issue of the South African Medical Journal.
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Many different measures of health and disease are used to describe the health of populations. In this article you will be introduced to the three fundamental measures of disease occurrence: prevalence, incidence rate and cumulative incidence. These can be calculated from the results of epidemiological studies conducted specifically to measure disease frequency or from routinely collected data (e.g. surveillance systems).
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