EVERY BODY KNOW ABOUT FEVER BUT NEVER KNOW ABOUT PUO.IT IS NOTHING BUT CALLED PYREXIA OF UNKNOWN ORGIN OR FEVER FOR UNKNOWN ORGIN,FIRST WE DISCUSS ABOUT FEVER,AFTER THAT PUO........FEVER MOST COMMON KNOWN WORD.WHAT IS NORMAL TEMPRATURE ?MOSTLY PEOPLE KNOW IT IS 98* F,BUT IT VARIES.IN MORNING LOWEST AND IN EVENING HIGHEST,DURINAL VARIATION IS 1.5*F.SO NORMAL BODY TEMPRATURE IS-98*F-99*F.BEFORE TAKING MEDICINE JUST CONFIRM,