Hi M.,
We, too, are selective. Along with a conservative variety of innoculations (flu, DTAP, meningitis--- we are waiting for a split-up MMR, but may change our minds and do the whole enchilada, and polio), we've also opted to get our son vaxed for Hep-B. I've worked in daycares, and while most of the adults I worked with were very careful regarding diapers/handwashing, kids aren't so meticulous. In fact, the preschoolers who wipe themselves after toileting are less-than-tidy sometimes-- it's really common for them to wipe front, back, then front, and hold onto that toilet paper.... and I can vouch for the fact that every handwashing session is not heavily supervised, so it's just too easy for kids to get each other sick, even in separate rooms. Sometimes, too, toys or play equipment is shared from room to room, so there's another opportunity for exposure, as are older siblings or adult "floaters" who relieve each other for breaks. Ideally, they should wash hands upon entering each age-group's environment, but it doesn't always happen. Yes, Ick!, that's why this one is really important to me.