Which of the following is the correct definition for a fever of unknown origin?

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Which of the following is the correct definition for a fever of unknown origin? Answer: Fever of over 38.3°C without diagnosis for 3 weeks

Classical fever of unknown origin involves recurrent documented fever above approximately 38.3°C lasting for at least three weeks without an established diagnosis after appropriate evaluation. The final option most closely represents this traditional definition.

Question context

This question is part of 🦠 Microbiology within the broader 🧬 Medical Science subject and appears in the BPSC – Balochistan Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.