the.com/incidence
The rate something happens, not how badly — that's severity's job.
means The rate or frequency with which something occurs, especially within a given population or time period.
from From Latin incidere, 'to fall upon or into' (in- 'upon' + cadere 'to fall'). The word originally carried the sense of something befalling you — an event falling into your path — before narrowing in statistics and medicine to mean how often such fallings happen across a group.
- vs prevalence
- incidence counts new cases, prevalence counts all existing ones
- epidemiology staple
- measured per population per time period, like cases per 1000 per year
- common mix-up
- news often confuses incidence with raw case counts
- physics cousin
- angle of incidence has nothing to do with disease