What other symptoms she has with fever is important like chills , cold or cough or any rash or headache/dizziness or burning sensation in urine
Next Steps
Do the following tests as soon as possible:
CBC with ESR
Blood C/S
Dengue serology and NS1
Malarial Parasite
CUE
Health Tips
Monitor vitals - BP , Spo2 , Temp , Pulse every 6-8 hourly.