Raihan K. answered • 08/30/19
Epidemiology tutor
Prevalence of a disease or health issue= it includes all the people with that specific health issue/disease in an area. This will includes people who newly had that health issue in current year as well as people with the health issue from previous years. In a nutshell, prevalence means everyone in the area with that disease/health issue.
Incidence= it only included people with that specific disease/health issue who are newly diagnosed. If you are trying to find how many people newly developed diabetes in Los Angeles in 2019, that is the incidence of diabetes in LA in 2019. If you are interested to know how many people have diabetes in LA in 2019, you have to include people newly diagnosed with diabetes in 2019 as well as people who already had diabetes before 2019 and currently have it.
