Vaccination rates are already quite high in Australia thanks to carrot and stick policies. Carrot: Maternal immunisation payment. Vaccinate your kid, get paid. Stick: Don't vaccinate your kid and you'll have a hell of a time getting them into childcare or schools. The problem with a law requiring vaccination is that it would be a pain to enforce, especially given the dismal state of medical records in this country. I'd be more interested in the implementation of other policies like the above which would encourage the small percentage who hold out against vaccination to change their ways.