Which statement best describes the attack rate in epidemiology?

Which statement best describes the attack rate in epidemiology?

• A. The proportion of new cases among the population at risk during a specified period.
• B. An incidence rate calculated for a specific disease for a specific period of time and expressed as a percentage.
• C. The incidence rate for the disease over a lifetime.
• D. The case-fatality rate for the disease.

Answer: (B)