Authorities worried UK strain of COVID-19 may be so infectious it broke through normal quarantine protocols ThuThursday 7 updated ThuThursday 7 Dr Jeannette Young said the woman had been "fantastic" and been cooperating fully with authorities. ( Share Print text only Cancel Contact tracers are scrambling to pinpoint close contacts of a Brisbane quarantine hotel cleaner diagnosed with COVID-19 after tests confirmed she was carrying the more contagious UK variant. Key points: Queensland health has issued alerts for people to get tested if they visited any of five venues the woman visited There are fears current infection safety protocols may not be enough to combat the mutated UK strain