Disease conditions are measured using various epidemiological metrics such as incidence, prevalence, morbidity, and mortality rates.
Incidence refers to the number of new cases of a disease in a specified population during a defined time period. Prevalence is the total number of cases, both new and pre-existing, in a population at a given time. Morbidity indicates the rate of disease in a population. Mortality measures the rate of death in a population due to disease.