If confirmed, it will be the first local case of the strain, and the first local coronavirus case in 16 days.
The 27-year-old from Wan Hang House on Wan Tau Tong Estate works as airport ground crew and has come into contact with cargo flight crew. He has also worked at customer service in Tai Po’s Uptown Plaza.
Health authorities say the testing of residents finished at 8 am and, so far, no positives have been found.
Meanwhile, residents of more than 30 Tai Po buildings were on Wednesday ordered to take Covid tests after a very high viral load was detected in sewage.
An expert described it as a serious warning sign that could mark the start of a fifth wave of infections.