My husband is a biology professor and seems dead certain they're safe, but I've heard so many scare stories that I'm worried. My child is the most important thing in the world, even if there's even the tiniest risk of ruining his life to protect him from a few uncomfortable spots now and then, has me going crazy inside!
YANBU. I felt really nervous too, and it's completely understandable when you're having your baby jabbed with something most of us don't really know that much about.
Having said that, it will be over pretty quickly and certainly from a couple of friend's experiences, those stats about the risk of catching one of the diseases the UK vaccinate against look a bit meaningless when it's your kid who has it.
Ooooh give your husband a slap, that post will go down like a lead balloon! But seriously, we all worry about things we do to our children, and how they will be affected buy them. However, there is no doubt that vaccines save lives, and I still get angry when I hear about some of the disgustingly low rates of MMR in some parts of London. Your DS will be fine
The only reason the likelihood of getting some of these dreadful preventable diseases which can seriously injure or even kill your child, is low, is because the majority of people vaccinate their children.
Just look at developing countries without robust vaccination programmes to see what the risks are. Measles epidemics aren't pretty.