Every single time I have taken mine to the ER I have been asked and my answer always looks like this guy

The reasons are because:
1) I have read stories and heard about cps being called if you say no.
2) it is irrelevant (every time I have taken them in I knew what was wrong so I had no worry about a vpd) because I have no intention of allowing them to do a vax (I would only consider TIG and since I have never taken either one in for a wound it has never came up) so whats the point it telling them I dont and then have to argue about it.
3) by telling them I dont vax this could lead to unneeded tests because they freak out about the child who "gasp" isnt vaxed. Since I have never told them we dont vax it is a non issue and I dont have to worry about being talked down to or possibly having cps on my doorstep.
If I thought that they had something that was a supposed vpd I would tell them we didnt vax because otherwise they may fail to test for it. But that has never been an issue to date.
IMO there are times when you should tell and times when it dosnt matter.
Should tell if the child is sick and you have no idea why.
No need to tell for a broken bone or an illness that you know the cause of.