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
Most common cause of sporadic encephalitis ?
assistant
The correct answer is  Ans. is `b' i.e., HSV "HSV encephalitis is the most common sporadic acute viral encephalitis in most pa of the world." -- Ananthnarayan