"no serious health risk associated with the vast majority of chickenpox cases" This just isn't true and the more people that refuse to vaccinate the more people who have it and spread it to children too young for the vaccine or old people with weaker immune systems. Not vaccinating is just lazy, stupid, and harmful to everyone else.
When my little brother got the chicken pox his temperature got up to 107. He was covered with them and had them down his throat. He couldn't eat or drink and was rushed over to the emergency room. They had to push lots of fluids and they said he could have died if they waited till the next morning to bring him in. Chicken pox can be VERY serious and deadly. VACCINATE!