Health authorities on Tuesday reported six new imported Covid-19 cases.
Four of the patients arrived from Pakistan, one from the United States and one from the United Kingdom.
The infected traveller from the UK is a 27-year-old woman who lives in Winning House in Sheung Wan and works at the International Commerce Centre in Tsim Sha Tsui.
She tested negative for Covid-19 before flying to the UK on November 7, but tested positive at Hong Kong airport when she came back on Sunday.
The Centre for Health Protection has ordered mandatory testing for where she lives and works, as well as places she had visited.