Epidemiology & Prevention USMLE Step 1 Practice Question
After a wedding reception, 96 guests are interviewed about acute gastroenteritis. Of the 60 guests who ate the shrimp appetizer, 36 became ill. Of the 36 guests who did not eat the shrimp appetizer, 6 became ill. Which of the following is the attack rate among those who ate the shrimp appetizer?
Answer choices
- A60/96
- B42/96
- C36/96
- D6/36
- E36/60Correct answer
- F30/96
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