Reports could be false negative.
Check his spo2, temp, BP,
sugar levels.
If fever (>100) persist for more than 2 days than consider getting repeat RTPCR along with se blood test to rule out covid and other causes.
Is fever associated with headache/lethargy/cough/diarrhoea??
Need detail history for proper evaluation
Next Steps
Consult me on practo for further assistance