Hi
First of all do not worry, because most important vaccines are given in between birth to 4 yrs . So if ur son was given vaccines correctly upto 4 yrs, then 80% Immunization was done successfully for ur son.
Now ,
in between 4-6 yrs of age there are 3 vaccines recommended.
DTP Booster 2, MMR , varicella.
If all of these were given at 4 yrs (if u can remember) then ur son is up to date for his vaccination now.
If not given, u can give your son varicella vaccine now from any doctors clinic or hospital.
Other two ( DTP booster 2, MMR) not recommended at this age(8yrs) even it was not given earlier. No need to worry for that.
Now in between 9-14 yrs there is Tdap vaccine. (In between 4-6 yrs and 9-14 yrs there is no other vaccines recommended). U can give your son Tdap vaccine from any Pediatrician’s clinic.
All of my above suggestions are according to latest Immunization schedule of Indian Academy of Pediatrics (IAP) which is generally followed by most of the Pediatrician in India.
Please feel free to ask if you have any further doubt. U can contact me also.
Thank you.
Next Steps
Visit a Paediatrician personally for vaccination
Health Tips
Do not go for vaccination if your son has any fever/cough/cold ( as this is the season for viral infection) . You can wait in that case for 1-2 weeks.