kiddos not vaccinated, some in school, some homeschool. Whooping cough went through schools and homeschool groups, but we didn't get it. Most of the kids that did were vaccinated, many of the unvaccinated kids did not. (This same thing happened to us about 8 years ago too, went through the local school and homeschool groups, but we didn't get it.)
We did however get chicken pox a few years ago, and everyone came through just fine.
We don't take vit. D or drink store bought milk, but do go outside every day.
I like elderberry syrup for respiratory system support, I make a big batch every summer/late summer and hope it is enough to get us through the winter.