Hong Kong fourth wave: health officials warn of spike in untraceable coronavirus infections as 112 new cases confirmed

Hong Kong health authorities warned of a 77 per cent spike in untraceable community Covid-19 infections over the past week, as 112 new cases were confirmed on Thursday, marking the third day in a row the city reported a triple-digit number.Officials also revealed their temporary threshold for mandatory testing – if four or more residents in a building are infected and do not know each other, the government will require everyone in the block to get screened for Covid-19.Dr Chuang Shuk-kwan, head…

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