Kailyn hasn't said anything more than the fact that they aren't vaccinating either of the boys but that they will still be able to attend school by simply filling out a specific form. There are many reasons that Kail might be choosing to not vaccinate her kids.
Because Kail is kind of a "crunchy mama" She could be choosing this option because she wants her kids to build up natural immunity to things such as the flu, chicken pox, and other diseases. She might be looking into alternative medicine such as Chinese herbs, or she could be afraid of side effects that are rare and not definitively proven like autism and mercury poisoning.
It's a personal choice that every parent has to make. However, if there is ever an outbreak in her area, her children will likely end up missing school, or have a greater chance of becoming seriously ill because they have no immunity to the very diseases that vaccines are meant to protect from.
What do you think about Kailyn's decision not to vaccinate her children?