IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-10-9-36599 Original Research Paper CLINICO-ETIOLOGICAL PROFILE OF FEVER OF UNKNOWN ORIGIN IN A TERTIARY CARE HOSPITAL OF KOLKATA, WEST BENGAL Mallik Dr. Sitanath Mandal Dr. Sonali Das Dr. September 2021 10 9 01 02