The amount or occurrence of disease, injury, or death in a given period of time.
The number of new cases of a disease during a given period, per thousand of population.
A measure of morbidity based on the number of new episodes of illness arising in a population over an estimated period. It can be expressed in terms of sick persons or episodes per 1000 individuals at risk. Compare prevalence rate.
The rate at which a disease occurs in a specific population over a set period is called its incidence. The trajectory followed by a ray or a projectile is its path.