Argy, you can ask.... And you can view the vaccine insert on line before you have it done.
Ghost because you are interacting with Pagwatch you have conceded that she is not one of these raving loony parents who doesn't vaccinate because they believe they are invented by lizard people yet it is OK for you to be rude to the rest of the people who make that choice.
I have yet to meet a parent who choose not to vaccinate who has not read, researched, agonized, sought opinions, researched again and again and who does not know the details of all vaccinations offered, their ingredients and side effects, the risks of those diseases they are designed to prevent, how to recognise those diseases and how to treat them and where to get help if they do get ill. They do not expect herd immunity to protect their children, a common argument thrown out, but they do take 100% responsibility for the health of their child.
Opinion is divided and there are strong feelings on both sides. Mumsnet is a difficult forum to have this discussion as any questioning of the established medical practices regarding vaccines is met with such anomosity it is difficult to engage without feeling attacked.
We do not have full understanding of how the immune system works, cannot explain fully why some people develop autoimmune disorders and some do not, and why incidences of these diseases are rising. Until we do, we cannot say that injecting vaccines into the body bypassing the natural defenses of the skin, the nasal membranes and the gut categorically does not affect the immune systems of all people.