In a village of 10,000 people, 200 develop acute watery diarrhea during a cholera outbreak and 20 of them die. The case fatality rate is:
- A 0.2%
- B 1%
- C 10% ✓
- D 20%
Correct answer: C. 10%
Explanation
Case fatality rate equals deaths among cases divided by total cases, multiplied by 100. CFR equals 20 divided by 200, multiplied by 100, which is 10%. CFR measures the severity of disease among those affected, not the mortality risk in the general population. Mortality rate would use total population as denominator.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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