Chief Health Officer Brett Sutton is urging parents and children to stick to the public health rules on Sunday, especially since those aged under 12 aren't yet eligible for a COVID vaccine.
"On trick or treating, we know it's becoming increasingly popular every year in Australia. Bear in mind that kids under 12 can't be vaccinated and do make up a not-insignificant proportion of our new cases every day," he told reporters on Friday.
"So keep your distance, be outside as much as possible, offer individually wrapped treats if you can - if you're offering treats from your home."
Professor Sutton added: "And make sure door knockers stay outside."
He reminded anyone planning to hold a Halloween party at home to "stick to the rules" and only allow up to 10 visitors inside their homes each day.
AAP with The Project