Hello,
From the symptoms he appears to be suffering from lower respiratory tract infection.
It's important you start him on antibiotics as he has fever and it's been 3 days already. Give him PCT 250 mg twice a day and tab Amoxicillin 250 mg twice a day for 5 days. I also suggest you follow the following:
- Keep him warm with blankets; make sure he sweats out the fever.
- Give him cough syrup as well for dry cough.
- If there is increased production of sputum, then give him steam inhalation with Vicks.
- Ask him to breathe in completely.
- I also advice you to give him enough fruits especially citrus fruits that will boost his immunity.
I also suggest you after his infection subside, teach him some breathing exercises and yoga every day. It will help him be healthy.
Thank you.