# of new cases of a specified disease in a population / population at risk for getting the disease
The incidence of disease is how frequent or widespread a disease is in the population. Severity is how bad and serious any particular disease is in a person.
# of new cases of a specified disease in a population / population at risk for getting the disease
prevalencerefers to the number of cases of disease thatexistsin a population and the incidence refers to the number of new cases of diseaseoccurringin a population.
Pandemic
Cumulative incidence is a measure of frequency, as in epidemiology where it is a measure of disease frequency during a period of time. Cumulative incidence is the incidence calculated using a period of time during which all of the individuals in the population are considered to be at risk for the outcome. It is sometimes referred to as the incidence proportion or the attack rate. Cumulative incidence is calculated by the number of new cases during a period divided by the number of people at risk in the population at the beginning of the study. Cumulative incidence is a measure of frequency, as in epidemiology where it is a measure of disease frequency during a period of time. Cumulative incidence is the incidence calculated using a period of time during which all of the individuals in the population are considered to be at risk for the outcome. It is sometimes referred to as the incidence proportion or the attack rate. Cumulative incidence is calculated by the number of new cases during a period divided by the number of people at risk in the population at the beginning of the study.
The prevalence of the disease.
The incidence will equal the prevalence when the duration of the disease is equal to the time period over which the incidence is measured.
Incidence of a disease refers to the number of new cases repoted recently
Endemic disease refers to the constant presence of a disease within a specific population or geographic area. It signifies the regular occurrence or constant level of a disease within a particular community over a long period of time.
An age standardized rate is, in the field of medicine, the incidence rate of a particular disease in a population assuming the population has a standard age structure.
Gastrointestinal diseases (including gastric ulcers) affect an estimated 25-30% of the world's population.