As per the Indian Academy of Paediatrics (IAP) vaccination schedule, the recommended ages are:
1. Haemophilus influenzae b vaccine: Three primary doses at 6, 10 and 14 weeks age and booster between 15 and 18 months of age.
2. Chicken pox (Varicella): Between 1 to 12 years of age - single dose; above 12 years - 2 doses at 1 month interval. Thus, immunisation can be given at any time after 1 year once you have decided to opt for this relatively expensive. However, the earlier you vaccine (say at 1 year of age), the longer will be the insurance.