system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
The area is declared free of epidemic
assistant
The correct answer is  Investigation of an Epidemic:
– To define magnitude or involvement (time, place, person)
– To determine responsible conditions and factors
– To identify causes, source(s) and modes of transmission
– To make recommendations to prevent reoccurrence.