In 2018 I got typhoid first time after that in 2019 I got it two tines in that year and after that I always feel like im sick and have some kind of fever and also whenever I got fever my stomach get upset and soreness in throat. I have done urine test. Ultrasound and wbc cbc test all the reports are negative I can not understand the cause of fever its come in everymongh twice or thrice please give me some suggestions.