Agree with so much on this thread, but then, in UK, where we do not pay for necessary vaccinations, there is no need for Doctors and drug companies to try to push us into extra ones.
However, the original OP did mention smoking, and that has not been followed up.
I would certainly sympathise with any parent of a young baby or child who did not want g.parents (or anyone else) who smoked getting too close to that child,
Surely, if g.parents are still using this horrible drug, this is an idea time for them to kick the habit - better to spend some money on help for that than extra vaccinations they and the child do not need for them to have.
Yes, and full breast feeding for at least the first 3- 6 months will give the baby so much immunity.
My third born was premature and due to circumstances I had to discharge us both from the hospital and come home to my husband and two small toddlers. Unfortunately, I then went down with a very nasty case of D&V. My two young children were not allowed anywhere near me, but (with doctors advice - and lots of hand washing) I continued to look after the prem baby as she was being totally breast fed and thereby getting immunity from me.
That was close on fifty years ago now and she is a strong healthy adult with four of her own children.