The onset of the 2019-20 winter influenza season in Hong Kong coincided with the emergence of the coronavirus disease epidemic in neighboring mainland China. After widespread adoption of large-scale social distancing interventions in response to the impending coronavirus disease outbreak, the influenza season ended abruptly with a decrease to a low trough.
Keywords: China; Hong Kong; SARS-CoV-2; coronavirus; coronavirus disease; influenza; influenza virus; respiratory infections; seasonal influenza; severe acute respiratory syndrome coronavirus 2; subsistence; viruses; zoonoses.