True statement regarding Prevalence:: (A) Cannot be used to determine the health needs of a community, (B) Independent of incidence, (C) Independent of duration, (D) Measures all cases
Answer is D. (Refer: K. Park’s Textbook of Preventive and Social medicine, 24th edition, pg no: 66, 67)

Incidence = New cases
Prevalence = New + Old cases
Prevalence = Incidence X Duration