What is the definition of severity in epidemiology?

Severity in epidemiology refers to the extent of harm or impact that a disease has on an individual or a population. It encompasses a range of factors, including morbidity, which is the condition of being diseased or unhealthy, and mortality, which is the incidence of death in a population. Severity can be measured using various indicators, such as hospital admission rates, intensive care unit (ICU) admissions, and case-fatality ratios.