Lin, a 5-year-11-month-boy. He-had a fever 20 days ago with no obvious trigger and reached the highest oral- temperature of- 40°C, no obvious cough, runny nose, vomiting, headache, dizziness, melena,...

Extracted text: Lin, a 5-year-11-month-boy. He-had a fever 20 days ago with no obvious trigger and reached the highest oral- temperature of- 40°C, no obvious cough, runny nose, vomiting, headache, dizziness, melena, urinary frequency, urgency, and dysuria but had nose bleeding. He visited a local hospital and-underwent a blood routine test: WBC=8.7X10°L, N=21%, RBC= 3.36X10%/L, BPC=75X 10°/L, Hb=109g/L; peripheral -blood smear shows: atypical cells 29%. The local hospital suspected "infectious mononucleosis", thus intravenous ganciclovir was given and his blood was extracted to check for anti-EBV antibody simultaneously. After 6-days of intravenous ganciclovir, his body temperature still fluctuated at around: 38°C. Anti-EBVVCA-IgM(-), anti-VCA-IgG(+) 1. Do you think the doctor's diagnosis is correct? And what do you think the next step would the doctor take? 2. How long does a normal fever and infectious fever last?