In a food poisoning outbreak, 150 out of 500 people who attended a wedding banquet developed gastroenteritis. The attack rate is:
- A 30% ✓
- B 15%
- C 25%
- D 35%
Correct answer: A. 30%
Explanation
Attack rate = (Number who fell ill / Total exposed) × 100 = (150/500) × 100 = 30%. The attack rate is used specifically in outbreak investigations for acute communicable diseases and reflects the probability of developing disease given exposure.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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