The department decided to change the rules after the they received evidence that:

  • most people (60 to 80 per cent) have some immunity because they were sick before or because they are vaccinated
  • the world has learned more about the virus – many people do not have any symptoms and only a small number of people are diagnosed
  • quarantine is expensive and many people lose their income because they cannot go to work, while children have to stay home from school