find out the school requirements for your state. then figure out which of those are for diseases that arent of such great concern for older kids. put those at the end of your to-do list.
does ex have a hot-button VPD or pet vax? go with that one first. can you find a doc to agree that there should be 6 mos between shots?
tell ex that you have agreed to vax, and that the kids doc has set up a personalized schedule for each based on age, gender, eye color, whatever. just make him think you agree with him.
then give him 6 mos to forget about it and carry on as usual.
FTR, for us, vax isnt a issue with ds1 and his dad bc most of his were already done b4 i began seeking. ex1 thinks all he's missing is the CP and he is ok with that. i dont correct him and its not an issue with us.
as for ds2 and his dad, when i was pg and we split, he "gave me permission" to not vax, with the exception of smallpox. that one he insisted on. LOL hey, it was immediately post 9-11, cut him some slack. haha only recently when his new wife had a baby boy did i learn his opinions on vax and circ had "changed". he's now majorly pro-both. gag. anyway, ds2 has no idea what receiving a vax entails, so a while back when he needed blood drawn, as we walked out of the lab i said "there, now you have ALL your shots!". if ex ever asks ds, he'll get the answer he wanted to hear, and if he ever asks me, he'll get a lie.
it's that or flee the country