Under new laws introduced on Tuesday, unvaccinated children are banned from childcare centres unless their parents can prove immunisation was against their religion or would cause a dangerous medical reaction.

Ms Dorey, who founded the Australian Vaccination Network, has urged her followers on social media to join the "Church of Conscious Living" as a way of avoiding the vaccination laws.

Health Minister Jillian Skinner was yesterday forced to answer questions in parliament about the loophole in her new laws, but admitted her hands were tied.

"The NSW government is not legally able to prevent people practising a religion or following religious beliefs," Ms Skinner said.