Incidence is the number of new cases of a condition, symptom, death, or injury that develop during a specific time period, such as a year.
Incidence shows the likelihood that a person in a certain population will be affected by that condition.
Taber's Medical Dictionary Online. Incidence. www.tabers.com/tabersonline/view/Tabers-Dictionary/729742/0/incidence?q=Incidence. Accessed June 11, 2019.