Billionaire Rosanna Wang Gaw tested positive yesterday, while a dance club she visited in Wan Chai saw five other preliminary positive cases.

The city saw 12 new confirmed cases yesterday, eight imported and four local ones.

Two of the local cases, including Wang Gaw, had an unknown source. More than 20 preliminarily positive cases were also reported yesterday, and Wong Ka-hing, the controller of the Center of Health Protection, warned there could be a rebound in infections.

Wang, 75, is the chairwoman of listed company Pioneer Global Group. Her son Goodwin Gaw chairs private equity firm Gaw Capital Partners, which has offered to buy the Cityplaza One office for about HK$10 billion.

Wang is also the sister of Johnson Electric Holdings chairman Patrick Wang Shui-chung.

The dance enthusiast lives at Victoria Heights, Mid-Levels, and works at 1 Lyndhurst Tower in Central. She went to the Starlight Dance Club on Lockhart Road on Saturday.

Chuang Shuk-kwan, the center's head of communicable diseases, said the patient started coughing on Monday and went to Hong Kong Sanatorium & Hospital the next day.

Of the five preliminary cases, Chuang said that "many of them, if not all, went to the club on November 14, so we suspect there may have been an outbreak on that day, but we cannot exclude other days.

"The setting [of the club] is that there is a dancing instructor paired with a student. They dance together somewhere supposedly separated from other groups," she added.

Two dance instructors teaching at the club also taught at Heavenly Dance Studio in Sheung Wan. Chuang said authorities have been in touch with the studio.

She also appealed to people who visited the club on November 14 to contact health authorities and undergo testing for Covid-19.

The other local case with an unknown source was a 65-year-old retired woman who lives at Block Two of Long Beach in Tai Kok Tsui. She fell ill on November 14 and saw a private doctor on November 16.

Before that, she dined with four friends on November 10 and another friend two days later.

Two other local cases included a five-month-old baby living in The Visionary in Tung Chung, and a family member of a 38-year-old aircrew who was confirmed earlier after returning from Kazakhstan.

The remaining case is a 74-year-old woman living in Yue Chak House at Yue Tin Court, Sha Tin. She was a close contact of a previously reported case.

One of the preliminary positive patients is a 27-year-old steel fixer who works at a construction site in Yuen Long and lives in Sik Man House at Ho Man Tin Estate. Twelve of his colleagues will be quarantined and more than 100 workers at the construction site will be tested, Chuang said.

Chuang said the worker joined a birthday party with about eight people at the Olympian Hong Kong hotel in West Kowloon on November 7 and developed symptoms on Sunday.

Rosanna Wang tested positive for Covid-19 after visiting Starlight Dance Club, where five other preliminary cases were found. sing tao

Billionaire tests positive after dance club visit