Royal Perth Hospital worker placed into quarantine following second breach involving COVID-positive patient updated 2 The breach happened when a staff member removed their surgical mask prematurely. ( Share Print text only Cancel There has been a second COVID-19 breach at Royal Perth Hospital, prompting a full review of the hospital's policies and procedures. Key points: It has sparked a full review of Royal Perth Hospital's procedures Authorities have described the risk of transmission as "very low" The second breach involved a staff member removing their surgical mask prematurely as they exited the hospital room of the COVID-positive captain of the bulk-carrier MV AquaGenie on Sunday.