However, results are still being verified in Tuen Mun.
Around 240 residents were tested at a building on To Kwa Wan Road and the lockdown there lifted at about 6:30am.
Meanwhile, the testing operations of over 1,800 people at blocks at Hing Wah Estate in Chai Wan, and almost 500 residents at Goodview Garden in Tuen Mun was wrapped up around 7am.
Earlier, the Centre for Health Protection said that even though the 19 new cases reported on Wednesday represented the lowest figure in two and a half months, the coronavirus situation was not yet under control because many infections had no clear source.