Hong Kong recorded 73 new cases of Covid-19 on Sunday, marking a new spike in infections, according to health authorities on Monday.
This is the highest daily figure since August 16, when Hong Kong experienced a "third wave" of the virus.
Cases in the city have hovered between zero and a dozen since that wave calmed in September.
Of Sunday's infections, 10 were imported from abroad, eight were untraceable, and 55 were confirmed as locally transmitted, according to Dr. Chuang Shuk-kwan of Hong Kong’s Centre for Health Protection of the Department of Health.
Fifty of the locally transmitted cases were linked back to a cluster involving 21 different dance studios in the city.