Hello,viral fever takes 5-7 days to resolve... You need only symptomatic treatment, adequate fluid and rest  for viral fever. But when their is wet cough and fever not resolving and blood reports showing raised WBC then we need to add antibiotic...that means it is bacterial infection

good immune system can fight viral infection and antibiotics will bring down the immunity as they cause dysbiosis. So for viral infection to boost immunity 1. take high dose vitamin c ( 2g in four dose) 2. fasting will help 3. vitamin d ( 5000iu/day) 4. Selenium supplements

Hello good morning sir, yes you are right and very nice observation are you made. Why the doctor are  prescribing antibiotics when there is a viral infection. This is a very big question I do not want to explain you in a single sentence but there is a lot of matter behind that was a doctor sir advising antibiotics in case of viral fever. Please try to contact me in the online and definitely I'll explain to you..