I believe that as long as the parent has looked into it and made the decision they feel is right for their child, without feeling pressured into it or doing something just because its what you are 'supposed' to do , then they have made the right choice. I am a bit of an odd one, my first child is not immunised at all, but this one will be. I am still looking into delaying immunisation, there have been studies done that show a link between delaying immunisation and reducing cot death, which are pretty interesting.