Hon Dr AYESHA VERRALL: Analysis of the Delta outbreak found very little evidence of transmission in the casual plus category. Preliminary analysis of data shows only 0.1 percent of casual plus interactions, such as being in the same supermarket as a COVID-19 case, resulted in infections. So, in the future, this category will be used in a narrow range of circumstances. Keeping the contact tracing categories as they were would've resulted in some people being identified as contacts when the data now tells us they're at very, very low risk. These changes will reduce the burden on individuals, businesses, and the community while keeping people safe.