"The city is on the alert after a 29-year-old man working in Dubai as an engineer was confirmed on Saturday to be the first locally detected Covid-19 case with the N501Y mutation, which has been linked to more infectious variants. His friend, a 31-year-old woman, was confirmed to be infected the next day. "

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https://www.scmp.com/news/hong-kong/health-environment/article/3130098/coronavirus-hong-kong-pandemic-adviser-suggests