Queensland Chief Health Officer Dr Jeannette Young said it was critical any unknown cases were detected “as quickly as possible through our testing system, to contain any potential spread”. “We are concerned by the new variants that are emerging overseas that are more contagious than previous variants we have seen in Queensland,” Dr Young said. Queensland Chief Health Officer Dr Jeannette Young is urging people to get tested if they are unwell. NCA NewsWire/Bianca De Marchi “It’s also possible that this detection relates to previous COVID-19 cases that can shed viral fragments for a couple of months after they are no longer infectious.