I think the basic answer to your question for me is, based on indivdual immunisations.

For example, if we lived in India, Charlotte would, without a shadow of a doubt, have the polio vaccination.
If we lived in South East Asia, Charlotte would have had, almost without a doubt (I say this due to other risk factors for her given family history with getting the vaccine itself which still weigh heavily), have the Hep B vaccine.

I don't not vaccinate because I rely on "herd immunity" I don't vaccinate as I rely on HER immunity - from coming in contact with the illness (in spite of vaccinations) and developing her own NATURAL immunity to illnesses where it is possible for the body to create antibodies. Whilst I understand the concept of herd immunity, I cannot say I am a full believer in it as I deny that vaccinations cause blanket immunity. Generally, the largest proportion of the population to get an illness are the ones vaccinated against it. Many illnesses are in steep decline without vaccinations in Western countries (ie Whooping Cough) so the notion of herd immunity does not really apply.

I'm rambling! lol

Short answer, yes - it would change as and when the risk assessment changes.