Killing power of disease is: (A) Secondary attack rate, (B) Case fatality rate, (C) IMR, (D) MMR
Answer is B. Ans. b (Case fatality rate). (Ref. Park, PSM, 17th ed., 52, 88)- CFR is measurement of killing power of a disease.Secondary attack rate =Number of exposed persons developing the disease within the range of IP------------------------------------------Total number of exposed/"susceptible" contactsx 100- The primary case is excluded from both the numerator and denominator.