Fears over Covid-19 cross-infections among thousands of residents locked down at an Omicron-hit public housing estate in Hong Kong have escalated, with experts warning a further rise in cases over the next few days may indicate internal transmissions have taken place.About 5,000 people have been confined to their flats in two of Kwai Chung Estate’s 16 blocks since last week, while the ongoing emergence of new cases resulted in the city’s leader expanding the lockdown operation on Tuesday to a…

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