【新朋友】点击标题下面蓝字【可可英语】加关注【老朋友】点击手机右上角图标【转发分享】内容听力文本A school has been shut down and health officials will be going door-to-door in Melbourne's north this morning in an attempt to limit a new COVID-19 cluster. A student at the East Preston Islamic College tested positive yesterday. The school said there was confusion about the case after siblings recovered from the virus, but the boy was supposed to stay in isolation. Other cases have been identified in a social housing block in Broadmeadows with 120 residents told to self isolate.Meantime, in New South Wales, a health alert has been issued for anyone who attended last week's Bathurst 1000 race. It comes after remnants of the virus were detected in raw sewage in the area. Racegoers and local residents are being urged to get tested if
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