Got the NHS letter asking us to book the standard UK pre-school boosters for our son (3.5 yrs - that's MMR, and DTaP/IPV boosters).
So we have an appointment - I made it for a Friday, because I think my older daughter did get a slight fever following this one and needed a day at home. I'll probably plan on taking pretty much the whole day off with him.
Lucky my daughter is into books about the body, so we had one from the library about what skin is for and how the body fights off germs. That mentioned vaccination, so when we last read it at bedtime we talked a little bit (in appropriate language) about what vaccines are for and why we get them.
I find this set of shots hard as I feel he will be confused by why "Mummy is hurting me" when I take him in. So I'm trying to explain it, and I will be ready to give lots of cuddles and reassurance for afterwards.
As the UK does not recommend annual flu shots for healthy children - and both my kids are very healthy - this may be the last shot he gets for quite a while.