I had a wonderful discussion with a school principal about this today at a birthday party. She is pro-vax, but understands that there are reasons why some parents choose not to. She did say that they cannot exclude a child from school based on vaccination status, but they will have to exclude if there is an outbreak. It's only a small school of 35 students so there is a 100% vaccination rate anyway she said so it's not a problem as such, but she is also accepting that vaccinated children will get an illness from time to time. We were talking about it because our area currently has a bout of both chicken pox and measles and we were discussing how the older children born earlier than 2006 are most at risk because the chicken pox vaccine was not put on the schedule until 2006, so you have all these kids that aren't vaccinated for it unless their parents paid for the vaccine. I paid for my older 3 to have it ($60 per vaccination) but there aren't many other local kids that were done when you had to pay for it yourself. So people can whinge and gripe about chicken pox, but there is an enormous amount of children that are not vaccinated for it by default because it wasn't on the schedule at the time of their births, so if you only ever follow the schedule, then there isn't going to be anywhere near 100% vaccinated populations for it.