This seems to be some viral or bacterial pharyngitis.
Next Steps
Get a test done(throat swab) for H1N1 influenza infection in a nearby lab. And then consult a physician.
Health Tips
Paracetamol can be given every 6 hrly. He might need antibiotics if fever continues. Keep him hydrated and ask him to do gargles with warm salted water.
Tab cofsil losenges can be given 4 hrly.