Having fever for more than 10 days. Getting high shivering and chills during Fever. Admitted in the hospital for more than 6 days. Tests for typhoid, malaria and dengue are negative. So what could be the reason for continuous fever and shivering. Is there anything else that need to be considered to find the reason for chills and fever. Also have diabetes level of 220. What should be done in this case and what diet should be followed.