We just had our one year old daughter vaccinated against chicken pox (we are from Canada) and I highly recommend it. Not only does it protect against chicken pox as a child and adult, but it protects against shingles which is a very painful and debilitating illness that often plagues seniors. My grandmother has been in pain and house ridden for one year because of shingles and it's wonderful to know my daughter will never experience that suffering.
Happy Immunizing!