Hi Mr. Shroff,
It is natural for a child to slowly develop immunity to various allergy-cauing substances and organisms. The process starts with cold
and sometimes there is fever
Your son has more problems that other kids of his age because he has moved to India from London.
The allergy-cauing substances and organisms of India are different from those in London. The pollution levels of India, especially Chennai, is also high.
There are no drugs in allopathy to increase your child's immunity, but we can give him B-Complex Syrups.
He may have Asthmatic Brochitis which is also because of allergy.
Testing his blood for finding his allergy causing substances may help.
Do not distrust your doctors. Find out from them if there is any ALLERGY SPECIALIST in Chennai.