Hong Kong recorded no locally transmitted Covid-19 cases for the sixth day in a row on Friday but added three imported ones, according to health authorities, bringing the city’s tally of confirmed infections to 1,127.The three new imported cases, aged from nine to 41, had all been in India before travelling to Hong Kong.On Thursday, the government said that tracer gas measurements, used to track how air moves through ventilation systems, had been conducted at Luk Chuen House at Lek Yuen Estate…
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