Australia's COVID-19 case numbers are on the rise again, with health officials signalling the arrival of new Omicron subvariants to our shores as a new wave begins.
It's the first sustained uptick since the "winter wave" of Omicron subvariant BA.5, University of Melbourne public health researcher Nancy Baxter told RN Breakfast on Friday.
"You have things like wastewater testing, sewage testing, and numbers are going up there [now]."
