In medicine, epidemiology and actuarial science, the term morbidity can refer to* the state of being diseased (from Latin morbidus: sick, unhealthy), the degree or severity of a disease, the prevalence of a disease: the total number of cases in a particular population at a particular point in time, the incidence of a disease: the number of new cases in a particular population during a particular time interval. disability irrespective of cause (for example, disability caused by accidents). Th… (More on Morbidity)