As long as you are giving your child the number of reccomended vaccinations and not extra ones then you are not giving them too many.
Regional and national health authorities in different areas and countries try to reduce the health threats that have caused the huge degrees of pain and suffering that used to exist in the region you live in.
Before you make a decision not to immunise your child, try a search on the diseases that the vaccine will protect your child from. As with many medicines, some side effects are always possible. However, a medicine is a substance, that on balance does more good than harm.
No parent makes every choice regarding their child correctly, but like medicine, just do more good than harm and they should turn out O.K.