Commuters wearing protective face masks in accordance with new public health regulations for riding public transit depart a train station in the wake of a COVID-19 outbreak in Sydney on Jan 6, 2021. SYDNEY: Australian authorities were racing to track the source of a mystery COVID-19 infection in Sydney on Thursday , thein more than a month, warning residents to brace for more cases.
Health officials are baffled by the case of a man in his 50s who tested positive on Wednesday, given he had no known links to high-risk jobs or people.The New South Wales state health department issued an alert naming more than a dozen venues visited by the unidentified man in recent days, including restaurants, cafes and shopping centres.
Tests on the man showed a higher viral load than typically seen in infected people, potentially increasing the chance that the man has spread the disease, the health department said. Considered to have been infectious since Apr 30, he was the first case reported in New South Wales since Mar 31. Authorities are investigating whether the case is genetically linked to anyone in the quarantine system or cases in other states, and are also checking which virus variant is involved.
Speedy tracing systems, movement curbs and border restrictions have largely reined in the spread of COVID-19 in Australia, which has recorded 29,865 cases and 910 deaths since the pandemic began.
年輕人得了新冠很多都是無症狀的
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