All I'd add to that is that now that I'm pregnant, my yet-to-be-born child is at serious health risk from my contact with any unvaccinated child or adult, and will continue to be at risk for the first year of his/her life, while still too young to be vaccinated.
In other words, if you choose not to vaccinate your children, I don't want your children anywhere near me for the next two years. Thank you.
If you would like vaccinate but cannot vaccinate your kids due to severe allergies, etc. -- I'm so sorry. You're welcome in my home; we'll share the risk.