Thanks for using Healthcaremagic,
After going through the details it seems that your brother in law is suffering from viral infection possibly Flu (H1N1?).
He is already quarantined and treated with antiviral Tamiflu
and antibiotics, I hope he would respond in few days and start recovering soon.
This disease is highly infectious so isolation is absolutely necessary.
Other symptoms can be treated with paracetamol
, and anti emetic drugs.
I hope he is already on the road to recovery. I wish him speedy recovery.
Dr. Akhilesh Dubey M.D.