[qwiz align=”center”]

[h] Header double-click to format

[q] ……. is the rate at which new events occur in a population and should not include old cases or dead cases in the denominator?

[c*] Show me the answer

[f] Incidence rate (IR).

Mnemonic: Incidence is the rate at which new cases coming in.

[q] …… is the cumulative incidence of infection in a group of people observed over a period of time during an epidemic, usually in relation to foodborne illness?

[c*] Show me the answer

[f] Attack rate.

[q] ……. is the rate at which All persons who experience an event in a population (old and new cases) and should not include dead cases in the denominator?

[c*] Show me the answer

[f] Prevalence rate.

[q] …… is prevalence during a particular “point in time“.

[c*] Show me the answer

[f] Point prevalence.

[q] …… is prevalence during a specified period or “span of time”.

[c*] Show me the answer

[f] Period prevalence.

[q] Prevalence ≈ incidence for ……..? Prevalence > incidence for …….?

[c*] Show me the answer

[f] short duration disease (common cold). Chronic diseases (diabetes).

Prevalence = Incidence × Duration (P = I × D)

[q] How do prevalence and incidence change if an effective prevention, such as a vaccine (primary prevention), is discovered?

[c*] Show me the answer

[f] Both incidence and prevalence will go down.

[/qwiz]