Which of the following will cause an increase in the prevalence of the disease: (AIIMS Nov 10)
|A||Immigration of healthy persons|
|B||Increased cure rate of the disease|
|C||Longer duration of the disease|
|D||Emigration of diseased persons|
Prevalence = Incidence X Duration
Hence, if the duration of illness increases it will increase the prevalence of the disease. All the other options in fact decrease the prevalence of the disease.